--- loncom/xml/londefdef.pm	2001/12/07 18:46:00	1.35
+++ loncom/xml/londefdef.pm	2003/02/05 23:17:32	1.111
@@ -1,7 +1,8 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.35 2001/12/07 18:46:00 sakharuk Exp $
+# $Id: londefdef.pm,v 1.111 2003/02/05 23:17:32 albertel Exp $
+# 
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -39,15 +40,19 @@
 #
 # last modified 06/26/00 by Alexander Sakharuk
 # 11/6,11/30,02/01/01,5/4 Gerd Kortemeyer
+# 01/18 Alex Sakharuk
 
 package Apache::londefdef; 
 
+use Apache::lonnet;
 use strict;
 use Apache::lonxml;
+use Apache::File();
+use Image::Magick;
 
-sub BEGIN {
+BEGIN {
 
-    &Apache::lonxml::register('Apache::londefdef',('m','html','head','map','select','option','input','textarea','form','meta','title','body','center','b','strong','table','dt','h1','h2','h3','h4','h5','h6','cite','i','address','dd','dl','dir','ol','ul','menu','dfn','kbd','tt','code','em','q','p','br','big','small','basefont','font','s','sub','strike','sup','hr','a','li','u','output','param','applet','img','embed','tr','td','allow','frameset'));
+    &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr'));
 
 }
 
@@ -68,18 +73,27 @@ sub start_m {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
   my $currentstring = '';
   if ($target eq 'web') {
-    my $inside = &Apache::lonxml::get_all_text("/m",$$parser[-1]);
+    $Apache::lonxml::prevent_entity_encode++;
+    my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
     $inside ='\\documentstyle{article}'.$inside;
-    #&Apache::lonxml::debug("M is starting with:$inside:");
+    &Apache::lonxml::debug("M is starting with:$inside:");
     my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
     if ($eval eq 'on') {
       $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
       #&Apache::lonxml::debug("M is evaulated to:$inside:");
     }
     $currentstring = &Apache::lontexconvert::converted(\$inside);
+    if ($Apache::lontexconvert::errorstring) {
+      &Apache::lonxml::warning("tth error: ".
+			       $Apache::lontexconvert::errorstring);
+      $Apache::lontexconvert::errorstring='';
+    }
     #&Apache::lonxml::debug("M is ends with:$currentstring:");
   } elsif ($target eq 'tex') {
-    $currentstring = "";
+    $currentstring = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
+    if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
+  } else {
+    my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
   }
   return $currentstring;
 }
@@ -87,33 +101,67 @@ sub end_m {
   my ($target,$token) = @_;
   my $currentstring = '';
   if ($target eq 'web') {
+    $Apache::lonxml::prevent_entity_encode--;
   } elsif ($target eq 'tex') {
     $currentstring = "";
   } elsif ($target eq 'meta') {
   }
   return $currentstring;
 }
+
+sub start_tthoption {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+  my $result;
+  if ($target eq 'web') {
+      my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser);
+      $inside=~s/^\s*//;
+      if ($ENV{'browser.mathml'}) {
+	  &tth::ttmoptions($inside);
+      } else {
+	  &tth::tthoptions($inside);
+      }
+  }
+}
+
+sub end_tthoption {
+  my ($target,$token) = @_;
+  my $result;
+  return $result;
+}
+
 #-- <html> tag    
-      sub start_html {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = &Apache::lonxml::xmlbegin().
-                               &Apache::lonxml::fontsettings();     
-	    } elsif ($target eq 'tex') {
-	      $currentstring .= '\documentclass[letterpaper]{article}
-                                 \setlength{\oddsidemargin}{-40pt}
-                                 \setlength{\evensidemargin}{-60pt}
-                                 \setlength{\topmargin}{200pt}
-                                 \setlength{\textwidth}{4.4in}
-                                 \setlength{\textheight}{6.8in}
-                                 \setlength{\parindent}{20pt}
-                                 \setlength{\marginparwidth}{90pt}
-                                 \setlength{\textfloatsep}{8pt plus 2.0pt minus 4.0pt}
-                                 \newcommand{\keephidden}[1]{}';
-	    }
-	   return $currentstring;
+sub start_html {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($ENV{'browser.mathml'}) {
+	&tth::ttminit();
+	if ($ENV{'browser.unicode'}) {
+	    &tth::ttmoptions('-L -u1');
+	} else {
+	    &tth::ttmoptions('-L -u0');
+	}
+    } else {
+	&tth::tthinit();
+	if ($ENV{'browser.unicode'}) {
+	    &tth::tthoptions('-L -u1');
+	} else {
+	    &tth::tthoptions('-L -u0');
 	}
+    }
+    if ($target eq 'web') {
+	$currentstring = &Apache::lonxml::xmlbegin().
+	    &Apache::lonxml::fontsettings();     
+    } elsif ($target eq 'tex') {
+	@Apache::londefdef::table = ();
+	$currentstring .= '\documentclass[letterpaper]{article}
+                                 \newcommand{\keephidden}[1]{}
+                                 \renewcommand{\deg}{$^{\circ}$}
+                                 \usepackage[dvips]{graphicx}
+                                 \usepackage{epsfig}\usepackage{calc}
+                                 \newenvironment{choicelist}{\begin{enumerate}}{\end{enumerate}}';
+    }
+    return $currentstring;
+}
         sub end_html {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -135,7 +183,7 @@ sub end_m {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = &Apache::lonxml::registerurl().
+              $currentstring = &Apache::lonxml::registerurl(undef,$target).
                                $token->[2];    
             } 
 	   return $currentstring;
@@ -312,11 +360,12 @@ sub end_m {
       }
 #-- <body> tag
         sub start_body {
-	    my ($target,$token) = @_;
+            my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	      if (!$Apache::lonxml::registered) {
-		$currentstring.='<head>'.&Apache::lonxml::registerurl().'</head>';
+		$currentstring.='<head>'.
+		    &Apache::lonxml::registerurl(undef,$target).'</head>';
 	      }
 	      my $onLoad='';
 	      foreach my $key (keys(%{$token->[2]})) {
@@ -325,7 +374,8 @@ sub end_m {
 		  delete($token->[2]->{$key});
 		}
 	      }
-	      $token->[2]->{'onLoad'}=$onLoad.&Apache::lonxml::loadevents();
+	      $token->[2]->{'onload'}=&Apache::lonxml::loadevents().
+		                       ';'.$onLoad;
 	      my $onUnload='';
 	      foreach my $key (keys(%{$token->[2]})) {
 		if ($key =~ /^onunload$/i) {
@@ -333,14 +383,21 @@ sub end_m {
 		  delete($token->[2]->{$key});
 		}
 	      }
-	      $token->[2]->{'onUnload'}=$onUnload.
-		&Apache::lonxml::unloadevents();
+	      $token->[2]->{'onunload'}=&Apache::lonxml::unloadevents().
+		                         ';'.$onUnload;
 
 	      $currentstring .= '<'.$token->[1];
-	      map {
-		$currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
-	      } keys %{$token->[2]};
+	      foreach (keys %{$token->[2]}) {
+	      	$currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
+	      }
 	      $currentstring.='>';
+	      if ($ENV{'request.state'} ne 'published') {
+		$currentstring.=(<<EDITBUTTON);
+		<form method="post">
+		<input type="submit" name="editmode" value="Edit" />
+		</form>
+EDITBUTTON
+	      }
        	    } elsif ($target eq 'tex') {
               $currentstring = '\begin{document}';  
 	    } 
@@ -440,7 +497,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{\textbf{';
+		$currentstring .= '{\large \textbf{';
 	    } elsif ($target eq 'meta') {
 		$currentstring='<subject>';
                 &start_output();
@@ -467,7 +524,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{\textbf{';
+		$currentstring .= '{\large \textbf{';
 	    } 
            return $currentstring;
 	}
@@ -488,7 +545,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{\textbf{';
+		$currentstring .= '{\large \textbf{';
 	    } 
            return $currentstring;
 	}
@@ -509,7 +566,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{\textbf';
+		$currentstring .= '{\large \textbf{';
 	    } 
            return $currentstring;
 	}
@@ -530,7 +587,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{\textbf{';
+		$currentstring .= '{\large \textbf{';
 	    } 
            return $currentstring;
 	}
@@ -551,7 +608,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{\textbf{';
+		$currentstring .= '{\large \textbf{';
 	    } 
            return $currentstring;
 	}
@@ -813,12 +870,14 @@ sub end_m {
 	}
 #-- <br> tag
         sub start_br {
-	    my ($target,$token) = @_;
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\\';
+		if ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
+		    $currentstring .= '\vskip 0.2 mm';
+		}
 	    } elsif ($target eq 'latexsource') {
 		$currentstring .= '\\';
 	    } 
@@ -839,9 +898,9 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{;
-	    } elsif ($target eq 'latexsource') {
 		$currentstring .= '\large{';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '{\Large ';
 	    }  
            return $currentstring;
 	}
@@ -864,9 +923,9 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= '\footnotesize{';
+		$currentstring .= '{\footnotesize ';
 	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '\footnotesize{';
+		$currentstring .= '{\footnotesize ';
 	    } 
            return $currentstring;
 	}
@@ -901,17 +960,21 @@ sub end_m {
       }
 #-- <font> tag
          sub start_font {
-	    my ($target,$token) = @_;
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
             my $currentstring = '';
             if ($target eq 'web') {
+	      my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
+	      if ($face=~/symbol/i) {$Apache::lonxml::prevent_entity_encode++;}
               $currentstring = $token->[4];     
 	    } 
 	   return $currentstring;
 	}
         sub end_font {
-	    my ($target,$token) = @_;
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
             my $currentstring = '';
             if ($target eq 'web') {
+	      my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
+	      if ($face=~/symbol/i) {$Apache::lonxml::prevent_entity_encode--;}
               $currentstring = $token->[2];    
             } 
 	   return $currentstring;
@@ -923,7 +986,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{\\underline ";
+	       &Apache::lonxml::startredirection();
 	    } 
            return $currentstring;
 	}
@@ -933,7 +996,10 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }";
+	       $currentstring=&Apache::lonxml::endredirection();
+	       $currentstring=~s/(\S)(\s+)(\S)/$1}$2\\underline{$3/g;
+	       $currentstring=~s/^\s*(\S)/\\underline{$1/;
+	       $currentstring=~s/(\S)\s*$/$1}/;	 	       
             }
            return $currentstring;
 	}
@@ -944,7 +1010,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{\\underline ";
+	       &Apache::lonxml::startredirection();
 	    } 
            return $currentstring;
 	}
@@ -954,7 +1020,10 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }";
+	       $currentstring=&Apache::lonxml::endredirection();
+	       $currentstring=~s/(\S)(\s+)(\S)/$1}$2\\underline{$3/g;
+	       $currentstring=~s/^\s*(\S)/\\underline{$1/;
+	       $currentstring=~s/(\S)\s*$/$1}/;	
             }
            return $currentstring;
 	}
@@ -1007,7 +1076,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\hline ";
+		$currentstring .= '\vskip 0 mm \noindent\makebox[\textwidth/2 ][b]{\hrulefill}\vskip 0 mm ';
 	    } 
            return $currentstring;
 	}
@@ -1020,6 +1089,23 @@ sub end_m {
 	    } 
            return $currentstring;
 	}
+#-- <div> tag
+        sub start_div {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= $token->[4];
+	    } 
+           return $currentstring;
+	}
+        sub end_div {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= $token->[2];
+	    } 
+           return $currentstring;
+	}
 #-- <a> tag
         sub start_a {
 	    my ($target,$token) = @_;
@@ -1039,7 +1125,6 @@ sub end_m {
                 my  $tempor_var = $stackref->[$#$stackref];
 		if (index($tempor_var,'name') != -1 ) {
 		    $tempor_var =~ s/name=([^,]*),/$1/g;
-#	        $currentstring .= " \\label{$tempor_var}";
 	        } elsif (index($tempor_var,'href') != -1 ) {
 		    $tempor_var =~ s/href=([^,]*),/$1/g;
 	        $currentstring .= " \\ref{$tempor_var}";
@@ -1084,7 +1169,7 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{\\underline ";
+	       &Apache::lonxml::startredirection();
 	    } 
            return $currentstring;
 	}
@@ -1094,7 +1179,10 @@ sub end_m {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }";
+	       $currentstring=&Apache::lonxml::endredirection();
+	       $currentstring=~s/(\S)(\s+)(\S)/$1}$2\\underline{$3/g;
+	       $currentstring=~s/^\s*(\S)/\\underline{$1/;
+	       $currentstring=~s/(\S)\s*$/$1}/;		
             }
            return $currentstring;
 	}
@@ -1105,7 +1193,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{itemize} ";  
+              $currentstring = '\begin{itemize}';  
 	    } 
 	   return $currentstring;
 	}
@@ -1115,7 +1203,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{itemize}";  
+              $currentstring = '\end{itemize}';  
 	    } 
 	   return $currentstring;
 	}
@@ -1168,7 +1256,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{enumerate} ";  
+              $currentstring = '\begin{enumerate}';  
 	    } 
 	   return $currentstring;
 	}
@@ -1178,7 +1266,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{enumerate}";  
+              $currentstring = '\end{enumerate}';  
 	    } 
 	   return $currentstring;
 	}
@@ -1189,7 +1277,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{description} ";  
+              $currentstring = '\begin{description}';  
 	    } 
 	   return $currentstring;
 	}
@@ -1199,7 +1287,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{description}";  
+              $currentstring = '\end{description}';  
 	    } 
 	   return $currentstring;
 	}
@@ -1210,7 +1298,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = "\\item[ ";  
+              $currentstring = '\item[';  
 	    } 
 	   return $currentstring;
 	}
@@ -1220,7 +1308,7 @@ sub end_m {
             if ($target eq 'web') {
               $currentstring = $token->[2];    
             } elsif ($target eq 'tex') {
-              $currentstring = "]";  
+              $currentstring = ']';  
 	    } 
 	   return $currentstring;
 	}
@@ -1242,90 +1330,351 @@ sub end_m {
 	   return $currentstring;
 	}
 #-- <table> tag
-        sub start_table {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = "";  
-	    } 
-	   return $currentstring;
+sub start_table {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web') {
+	$currentstring = $token->[4];     
+    } elsif ($target eq 'tex') {
+	my $aa = {};
+	push @Apache::londefdef::table, $aa; 
+	$Apache::londefdef::table[-1]{'row_number'} = -1;
+	$Apache::londefdef::table[-1]{'output'} = ' \noindent \begin{tabular} ';
+	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval,undef,1); 
+	unless (defined $border) { $border = 0; }
+	if ($border) { 
+	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
+	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
+	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
+	} else {
+	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
+	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
+	    $Apache::londefdef::table[-1]{'vvinc'} = '';
+	}
+	my $width;
+	foreach my $key (keys(%{$token->[2]})) {
+	    if ($key =~ /^width$/i) {
+		$width = &Apache::lonxml::get_param($key,$parstack,$safeeval,undef,1);
+	    }
 	}
+	if (defined($width)) { $Apache::londefdef::table[-1]{'width'}=$width; }
+    }
+    return $currentstring;
+}
         sub end_table {
-	    my ($target,$token) = @_;
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = "";  
-	    } 
+		my $inmemory = '';
+		my $output = '';
+                #construct header of the table
+		my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
+		my $in;
+		for ($in=0;$in<=$Apache::londefdef::table[-1]{'counter_columns'};$in++) {
+		    $header_of_table .= $Apache::londefdef::table[-1]{'columns'}[$in].$Apache::londefdef::table[-1]{'vvinc'};
+		}
+		$header_of_table .= '}';
+                #fill the table
+		for ($in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
+		    $output .=  $Apache::londefdef::table[-1]{'rowdata'}[$in];
+		    chop $output;
+		    $output .= ' \\\\ ';
+		}
+                #define the length of the table cells
+		my @lengthforoutput = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[0]);
+		my $how_many_columns = $#lengthforoutput + 1; #total number of columns in the table 
+		my $filled_columns = 0; #number of columns with information about width
+		my $available_space = ' ';
+		foreach my $tempo_length (@{ $Apache::londefdef::table[-1]{'lengthrow'} }) {
+		    my @length = split(/,/,$tempo_length);
+		    for (my $ico=0;$ico<=$#lengthforoutput;$ico++) {
+			$lengthforoutput[$ico] =~ m/(\d*\.?\d*)\s*(\w+)/;
+			my $old_value = $1;
+			my $old_unit = $2; 
+			if ($old_unit eq 'cm') { 
+			    $old_value = $old_value * 10;
+			} elsif ($old_unit eq 'in') { 
+			    $old_value = $old_value * 25.4;
+			} elsif ($old_unit eq 'pt') {
+			    $old_value = $old_value * 25.4/72.27;
+			} elsif ($old_unit eq 'pc') {
+			    $old_value = $old_value * 25.4/6.022;
+			}
+			$old_unit = 'mm';
+ 			$length[$ico] =~ m/(\d*\.?\d*)\s*(\w+)/;
+			my $new_value = $1;
+			my $new_unit = $2;
+			if ($new_unit eq 'cm') { 
+			    $new_value = $new_value * 10;
+			} elsif ($old_unit eq 'in') { 
+			    $new_value = $new_value * 25.4;
+			} elsif ($old_unit eq 'pt') {
+			    $new_value = $new_value * 25.4/72.27;
+			} elsif ($old_unit eq 'pc') {
+			    $new_value = $new_value * 25.4/6.022;
+			}
+			$new_unit = 'mm';
+			if ($old_value < $new_value) {
+			    $lengthforoutput[$ico] = $new_value.' mm';
+			} else {
+			    $lengthforoutput[$ico] = $old_value.' mm';
+			}		 
+		    }
+		}
+		for (my $ico=0;$ico<=$#lengthforoutput;$ico++) {
+		    if (not $lengthforoutput[$ico]=~m/^\s*0\s*\w*\s*$/) {
+			$filled_columns++;
+			$available_space = $available_space.' - '.$lengthforoutput[$ico];
+		    }
+		}
+		my $temp_file;
+		my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.tbl";
+		if (-e $filename) {
+		    $temp_file = Apache::File->new($filename); 
+		    my @tbl_file_content = <$temp_file>;
+		    my ($one,$two,$three) = split(/,/,$tbl_file_content[0]);
+		        $how_many_columns+=$one-1;
+		        $filled_columns+=$two;
+		    if($three=~/\S/) {$available_space = $available_space.' - '.$three;}
+		} else {
+		    $temp_file = Apache::File->new('>>'.$filename); 
+		}		
+		print $temp_file "$how_many_columns,$filled_columns,$available_space\n";
+		$output =~ s/\\parbox{TOBECHANGEDONNUMBER}{}/\\parbox{1 mm}{}/g;
+		$output =~ s/\\parbox{TOBECHANGEDONNUMBER}/\\parbox{\$SpacePerColumn}/g;
+		my @tagar = @$tagstack;
+		my $signature = 1;
+		for (my $ico=0;$ico<$#tagar;$ico++) {
+		     if ($tagar[$ico] eq 'table') { $signature = 0; }
+		}
+		if ($signature) {
+		    my $NumberEmptyLength = $how_many_columns - $filled_columns;		
+		    my $SpacePerColumn = '(\textwidth '.$available_space.')/'.$NumberEmptyLength;
+		    my $shorthand = ($filled_columns+1)*4;
+		    $output =~ s/\$SpacePerColumn/$SpacePerColumn - $shorthand mm/g;
+		}	
+		if ($how_many_columns==1) {  #start of block with width correction for one column table
+		  $output=~s/^\s*\\parbox{([^}]*)}/\\parbox{\\textwidth - 1 cm}/;
+		}                            #end of block with width correction for one column table
+		$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$output.$Apache::londefdef::table[-1]{'hinc'}.'\end{tabular}\vskip 0 mm ';
+		if ($#Apache::londefdef::table > 0) {
+		    $inmemory = $Apache::londefdef::table[-1]{'output'};
+		    pop @Apache::londefdef::table;
+		    $Apache::londefdef::table[-1]{'rowdata'}[$Apache::londefdef::table[-1]{'row_number'}] .= $inmemory
+		} else {
+		    $currentstring = $Apache::londefdef::table[-1]{'output'};
+		    $currentstring =~ s/\\\\\s+\\\\/\\\\/g; 
+		    pop @Apache::londefdef::table;
+		    if (-e $filename) {
+			unlink $filename;
+		    }
+		}
+	    }
 	   return $currentstring;
 	}
 #-- <tr> tag
         sub start_tr {
-	    my ($target,$token) = @_;
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-	      $currentstring = '';
+		$Apache::londefdef::table[-1]{'row_number'}++;
+		my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
+		if ($alignchar ne '') {
+		    push @ {$Apache::londefdef::table[-1]{'rows'} }, $alignchar;
+		} else {
+		    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
+		}
+		push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
+		$Apache::londefdef::table[-1]{'counter_columns'} = -1;
+		$Apache::londefdef::table[-1]{'length'} = ''; 
 	    } 
 	   return $currentstring;
-	}
+	}        
         sub end_tr {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = $token->[2];     
+		$currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = "";  
-	    } 
+		push @{ $Apache::londefdef::table[-1]{'lengthrow'} },$Apache::londefdef::table[-1]{'length'};
+
+	    }
 	   return $currentstring;
 	}
 #-- <td> tag
         sub start_td {
-	    my ($target,$token) = @_;
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-	      $currentstring = '';
+		my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
+		if ($what_to_push eq '') {
+		    $what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;
+		}
+		    push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;
+		$Apache::londefdef::table[-1]{'counter_columns'}++;
+		&Apache::lonxml::startredirection();
 	    } 
 	   return $currentstring;
-	}
+	}        
         sub end_td {
 	    my ($target,$token) = @_;
             my $currentstring = '';
+            my $tempolen = '';
             if ($target eq 'web') {
-              $currentstring = $token->[2];     
+		$currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = "";  
-	    } 
+		my $current_row = $Apache::londefdef::table[-1]{'row_number'};
+		my $data=&Apache::lonxml::endredirection();
+		if ($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt))/) {                 
+                    $Apache::londefdef::table[-1]{'length'} .= $1.',';
+		    $tempolen = $1;         
+		} else {
+		    if (length($data)<5) {
+			$Apache::londefdef::table[-1]{'length'} .= '0 mm,';
+			$tempolen = '6 mm';
+		    } else {
+			$Apache::londefdef::table[-1]{'length'} .= '0 mm,';
+			$tempolen = 'TOBECHANGEDONNUMBER';
+		    }
+                }                                        
+		@{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{'.$tempolen.'}{'.$data.'} '.$Apache::londefdef::table[-1]{'vinc'};
+	    }
 	   return $currentstring;
 	}
-#-- <img> tag
-
-        sub start_img {
-	    my ($target,$token) = @_;
-            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
-                                        $token->[2]->{'src'};
+#-- <th> tag
+        sub start_th {
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{figure} ";  
+		my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
+		if ($what_to_push eq '') {
+		    $what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;
+		}
+		    push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;
+		$Apache::londefdef::table[-1]{'counter_columns'}++;
+		&Apache::lonxml::startredirection();
+;
 	    } 
 	   return $currentstring;
+	}        
+        sub end_th {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+		$currentstring = $token->[2];     
+	    } elsif ($target eq 'tex') {
+		my $current_row = $Apache::londefdef::table[-1]{'row_number'};
+		my $data=&Apache::lonxml::endredirection();
+		if ($data=~m/width\s*=\s*(\d+\.*\d*\s*(mm|cm))/) {                 
+                    $Apache::londefdef::table[-1]{'length'} .= $1.',';             
+		} else {
+		    $Apache::londefdef::table[-1]{'length'} .= '0 mm,'; 
+                }                                                           
+		@{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{'.$1.'}{\textbf{'.$data.'}} '.$Apache::londefdef::table[-1]{'vinc'};
+	    }
+	   return $currentstring;
+	}
+#-- <img> tag
+        sub start_img {
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+	    my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
+						 undef,1);
+            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;
+            my $currentstring = '';
+	    my $width_param = '';
+	    my $height_param = '';
+	    my $scaling = .3;
+
+	    if ($target eq 'web') {
+              $currentstring = $token->[4];
+	    } elsif ($target eq 'tex') {
+	      &image_replication($src);
+	      $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
+              #if original gif/jpg/png file exist do following:
+              if (-e $src) {          
+                  #defines the default size of image
+		  my $image = Image::Magick->new;
+		  my $current_figure = $image->Read($src);
+		  $width_param = $image->Get('width') * $scaling;;
+		  $height_param = $image->Get('height') * $scaling;;
+		  undef $image;
+		  #do we have any specified size of the picture?
+		  my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);
+		  my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);
+		  my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
+                                                         undef,1);
+		  if ($TeXwidth ne '') {  
+		      if ($TeXwidth=~/(\d+)\s*\%/) {
+			  $width_param = $1*$ENV{'form.textwidth'}/100;
+		      } else { 
+			  $width_param = $TeXwidth;
+		      }
+		  } elsif ($TeXheight ne '') {
+			  $width_param = $TeXheight/$height_param*$width_param;
+		  } elsif ($width ne '') {
+		      $width_param = $width*$scaling;      
+		  }
+		  my $file;
+		  my $path;	
+		  if ($src =~ m!(.*)/([^/]*)$!) {
+		      $file = $2; 
+		      $path = $1.'/'; 
+		  } 
+		  my $newsrc = $src;
+		  $newsrc =~ s/\.(gif|jpg|png)$/.eps/i;
+		  $file=~s/\.(gif|jpg|png)$/.eps/i;
+		  #where can we find the picture?
+		  if (-e $newsrc) {
+                      #eps counterpart for image exist 
+		      if ($path) {
+			  $currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
+		      }
+		  } else {
+                      #there is no eps counterpart for image - check for ps one
+		      $newsrc =~ s/\.eps$/\.ps/;
+		      if (-e $newsrc) {
+			  #ps counterpart for image exist 
+			  $file =~ s/\.eps$/\.ps/;
+			  if ($path) {
+			      $currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
+			  }
+		      } else {
+			  #there aren't eps or ps - so create eps 
+			  my $temp_file;
+			  my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
+			  $temp_file = Apache::File->new('>>'.$filename); 
+			  print $temp_file "$src\n";
+			  $currentstring .= '\vskip 1 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
+		      }
+		  }
+	      } else {
+		  #original image file doesn't exist so check the alt attribute
+		  my $alt = &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
+                  if ($alt) {
+		      $currentstring .= ' '.$alt.' ';
+		  } else {
+                     #<allow> tag will care about replication 
+		  }
+	      }
+	    }
+	    return $currentstring;
 	}
         sub end_img {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = $token->[2];     
+              $currentstring = $token->[2];
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{figure}";  
-	    } 
+              $currentstring = '';
+	    }
 	   return $currentstring;
 	}
 #-- <applet> tag
@@ -1334,41 +1683,41 @@ sub end_m {
 	    my ($target,$token) = @_;
               $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
                                         $token->[2]->{'code'};
-              $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
+              $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                                         $token->[2]->{'archive'};
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = $token->[4];     
+              $currentstring = $token->[4];
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{figure} ";  
-	    } 
-	   return $currentstring;
-	}
-        sub end_applet {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{figure}";  
+              $currentstring = " \\begin{figure} ";
 	    } 
 	   return $currentstring;
 	}
+sub end_applet {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = " \\end{figure}";
+    } 
+    return $currentstring;
+}
 
 #-- <embed> tag
 
-        sub start_embed {
-	    my ($target,$token) = @_;
-            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
-                                        $token->[2]->{'src'};
-           my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{figure} ";  
-	    } 
-	   return $currentstring;
-	}
+sub start_embed {    
+    my ($target,$token) = @_;
+    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
+	$token->[2]->{'src'};
+    my $currentstring = '';
+    if ($target eq 'web') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring = " \\begin{figure} ";  
+    } 
+    return $currentstring;
+}
         sub end_embed {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -1408,27 +1757,39 @@ sub end_m {
 	    } 
 	   return $currentstring;
 	}
-
 #-- <allow> tag
+sub start_allow {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
+	$token->[2]->{'src'};
+    my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
+    &image_replication($src);
+    my $result;
+    if ($target eq 'edit') {
+	$result .=&Apache::edit::tag_start($target,$token);
+	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
+	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'src');
+	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
+    }
+    return $result;
+}
 
-        sub start_allow {
-	    my ($target,$token) = @_;
-
-            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
-                                        $token->[2]->{'src'};
-
-	   return '';
-	}
-        sub end_allow {
-	   return '';
-	}
+sub end_allow {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
+    return '';
+}
 #-- Frames
 	sub start_frameset {
 	  my ($target,$token) = @_;
 	  my $currentstring = '';
 	  if ($target eq 'web') { 
 	    if (!$Apache::lonxml::registered) {
-	      $currentstring.='<head>'.&Apache::lonxml::registerurl().'</head>';
+	      $currentstring.='<head>'.
+		  &Apache::lonxml::registerurl(undef,$target).'</head>';
 	    }
 	    $currentstring .= $token->[4];
 	  }
@@ -1442,5 +1803,794 @@ sub end_m {
 	  }
 	  return $currentstring;
 	}
+#-- <pre>
+	sub start_pre {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= $token->[4];
+	    } elsif ($target eq 'tex') {
+		$currentstring .= '\begin{verbatim}';
+	    } 
+           return $currentstring;
+	}
+        sub end_pre {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= $token->[2];
+	    } elsif ($target eq 'tex') {
+		$currentstring .= '\end{verbatim}';
+	    }
+           return $currentstring;
+	}
+#-- <insert>
+	sub start_insert {
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+		my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
+	       $currentstring .= '<b>'.$display.'</b>';;
+	    }
+           return $currentstring;
+	}
+        sub end_insert {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= '';
+	    }
+           return $currentstring;
+	}
+#-- <externallink>
+	sub start_externallink {
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+		my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
+	       $currentstring .= '<b>'.$display.'</b>';;
+	    }
+           return $currentstring;
+	}
+        sub end_externallink {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= '';
+	    }
+           return $currentstring;
+	}
+#-- <blankspace heigth="">
+        sub start_blankspace {
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+            my $currentstring = '';
+            if ($target eq 'tex') {
+		my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
+		$currentstring .= '\vskip '.$howmuch.' ';
+	    }
+           return $currentstring;
+	}
+        sub end_blankspace {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'tex') {
+	       $currentstring .= '';
+	    }
+           return $currentstring;
+	}
+#-- <abbr> tag
+      sub start_abbr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_abbr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <acronym> tag
+      sub start_acronym {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_acronym {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <area> tag
+      sub start_area {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_area {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <base> tag
+      sub start_base {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_base {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <bdo> tag
+      sub start_bdo {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_bdo {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <bgsound> tag
+      sub start_bgsound {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_bgsound {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <blink> tag
+      sub start_blink {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_blink {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <blockquote> tag
+      sub start_blockquote {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_blockquote {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <button> tag
+      sub start_button {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_button {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <caption> tag
+      sub start_caption {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_caption {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <col> tag
+      sub start_col {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_col {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <colgroup> tag
+      sub start_colgroup {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_colgroup {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <del> tag
+      sub start_del {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_del {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <fieldset> tag
+      sub start_fieldset {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_fieldset {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <frame> tag
+      sub start_frame {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_frame {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <iframe> tag
+      sub start_iframe {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_iframe {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <ins> tag
+      sub start_ins {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_ins {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <isindex> tag
+      sub start_isindex {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_isindex {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <keygen> tag
+      sub start_keygen {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_keygen {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <label> tag
+      sub start_label {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_label {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <layer> tag
+      sub start_layer {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_layer {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <legend> tag
+      sub start_legend {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_legend {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <link> tag
+      sub start_link {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_link {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <marquee> tag
+      sub start_marquee {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_marquee {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <malticol> tag
+      sub start_malticol {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_malticol {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <nobr> tag
+      sub start_nobr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_nobr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <noembed> tag
+      sub start_noembed {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_noembed {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <noframes> tag
+      sub start_noframes {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_noframes {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <nolayer> tag
+      sub start_nolayer {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_nolayer {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <noscript> tag
+      sub start_noscript {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_noscript {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <object> tag
+      sub start_object {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_object {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <optgroup> tag
+      sub start_optgroup {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_optgroup {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <samp> tag
+      sub start_samp {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_samp {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <server> tag
+      sub start_server {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_server {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <spacer> tag
+      sub start_spacer {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_spacer {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <span> tag
+      sub start_span {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_span {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <tbody> tag
+      sub start_tbody {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_tbody {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <tfoot> tag
+      sub start_tfoot {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_tfoot {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <thead> tag
+      sub start_thead {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_thead {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <var> tag
+      sub start_var {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_var {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+#-- <wbr> tag
+      sub start_wbr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } 
+	   return $currentstring;
+	}
+        sub end_wbr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];    
+            } 
+	   return $currentstring;
+	}
+
+sub image_replication {
+    my $src = shift;
+    if (not -e '/home/httpd/html'.$src) {
+	#replicates image itself
+	&Apache::lonnet::repcopy('/home/httpd/html'.$src);
+	#replicates eps or ps 
+	my $newsrc = $src;
+	$newsrc =~ s/\.(gif|jpg|png)$/.eps/;
+	if (not-e $newsrc && &Apache::lonnet::repcopy('/home/httpd/html'.$newsrc) ne 'OK') {
+	    $newsrc =~ s/\.eps$/\.ps/;
+	    &Apache::lonnet::repcopy('/home/httpd/html'.$newsrc);
+	}
+    }
+    return '';
+}
+
 1;
 __END__