--- loncom/xml/londefdef.pm	2000/10/12 13:51:50	1.5
+++ loncom/xml/londefdef.pm	2002/03/06 20:37:38	1.48
@@ -1,61 +1,135 @@
+
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
+# $Id: londefdef.pm,v 1.48 2002/03/06 20:37:38 sakharuk Exp $
+# 
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+# Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
+# TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
+# binary executable programs or libraries distributed by the 
+# Michigan State University (the "Licensee"), but any binaries so 
+# distributed are hereby licensed only for use in the context
+# of a program or computational system for which the Licensee is the 
+# primary author or distributor, and which performs substantial 
+# additional tasks beyond the translation of (La)TeX into HTML.
+# The C source of the Code may not be distributed by the Licensee
+# to any other parties under any circumstances.
+#
+#
 # 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 strict;
 use Apache::lonxml;
 
-sub BEGIN {
-    &Apache::lonxml::register('Apache::londefdef',('m','html','head','map','applet','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'));
+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','pre','insert','externallink'));
+
 }
 
-#===================================================================== TAG SUBROUTINES
+#======================= TAG SUBROUTINES =====================
+#-- <output>
+sub start_output {
+  my ($target) = @_;
+  if ($target eq 'meta') { $Apache::lonxml::metamode--; }
+  return '';
+}
+sub end_output {
+  my ($target) = @_;
+  if ($target eq 'meta') { $Apache::lonxml::metamode++; }
+  return '';
+}
 #-- <m> tag
-        sub start_m {
-	    my ($target,$token,$parstack,$parser) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-		my $inside = &Apache::lonxml::get_all_text("/m",$$parser[$#$parser]); 
-                $inside ='\\documentstyle{article}'.$inside;
-#          &Apache::lonxml::debug($inside);
-                $currentstring = &Apache::lontexconvert::converted(\$inside);
-#          &Apache::lonxml::debug($currentstring);
-
-	    } elsif ($target eq 'tex') {
-              $currentstring = "\$";
-            }
-	   return $currentstring;
-	}
-        sub end_m {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-            } elsif ($target eq 'tex') {
-              $currentstring = "\$";
-            }
-	   return $currentstring;
-	}
-#-------------------------------------------------------------------------- <html> tag    
+sub start_m {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+  my $currentstring = '';
+  if ($target eq 'web') {
+    my $inside = &Apache::lonxml::get_all_text("/m",$$parser[-1]);
+    $inside ='\\documentstyle{article}'.$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 = "";
+  }
+  return $currentstring;
+}
+sub end_m {
+  my ($target,$token) = @_;
+  my $currentstring = '';
+  if ($target eq 'web') {
+  } elsif ($target eq 'tex') {
+    $currentstring = "";
+  } elsif ($target eq 'meta') {
+  }
+  return $currentstring;
+}
+#-- <html> tag    
       sub start_html {
 	    my ($target,$token) = @_;
             my $currentstring = '';
+	    if ($ENV{'browser.mathml'}) {
+	      &tth::ttminit();
+	    } else {
+	      &tth::tthinit();
+	    }
             if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
+              $currentstring = &Apache::lonxml::xmlbegin().
+                               &Apache::lonxml::fontsettings();     
+	    } elsif ($target eq 'tex') {
+	      $currentstring .= '\documentclass[letterpaper]{article}
+                                 \newcommand{\keephidden}[1]{}           
+                                 \usepackage[dvips]{graphicx}
+                                 \usepackage{epsfig}';
+	    }
 	   return $currentstring;
 	}
         sub end_html {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
+		$currentstring = &Apache::lonxml::xmlend();
+	    }
 	   return $currentstring;
 	}
-#-------------------------------------------------------------------------- <head> tag
+#-- <head> tag
       sub start_head {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -68,11 +142,12 @@ sub BEGIN {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = $token->[2];    
+              $currentstring = &Apache::lonxml::registerurl(undef,$target).
+                               $token->[2];    
             } 
 	   return $currentstring;
 	}
-#--------------------------------------------------------------------------- <map> tag
+#-- <map> tag
       sub start_map {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -89,24 +164,7 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	}
-#------------------------------------------------------------------------ <applet> tag
-      sub start_applet {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_applet {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#------------------------------------------------------------------------ <select> tag
+#-- <select> tag
       sub start_select {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -123,7 +181,7 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	}
-#------------------------------------------------------------------------ <option> tag
+#-- <option> tag
       sub start_option {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -140,7 +198,7 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	}
-#------------------------------------------------------------------------- <input> tag
+#-- <input> tag
       sub start_input {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -157,7 +215,7 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	}
-#---------------------------------------------------------------------- <textarea> tag
+#-- <textarea> tag
       sub start_textarea {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -174,7 +232,7 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	}
-#-------------------------------------------------------------------------- <form> tag
+#-- <form> tag
       sub start_form {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -191,13 +249,19 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	}
-#------------------------------------------------------------------------- <title> tag
+#-- <title> tag
       sub start_title {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
+	    } elsif ($target eq 'tex') {
+              $currentstring .= '\keephidden{' 
 	    }
+            if ($target eq 'meta') {
+		$currentstring='<title>';
+                &start_output();
+            }
 	   return $currentstring;
 	}
         sub end_title {
@@ -205,34 +269,96 @@ sub BEGIN {
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[2];    
+            } elsif ($target eq 'tex') {
+              $currentstring .= '}';
+	    }  
+            if ($target eq 'meta') {
+               &end_output();
+               $currentstring='</title>';
             } 
 	   return $currentstring;
 	}
-#-------------------------------------------------------------------------- <meta> tag
+#-- <meta> tag
       sub start_meta {
-	    my ($target,$token) = @_;
+	    my ($target,$token,$tagstack,$parstack,$parser) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = $token->[4];     
+	      my $args='';
+	      if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+	      if ($args eq '') {
+		&Apache::lonxml::get_all_text("/meta",$$parser[$#$parser]);
+	      } else {
+		$currentstring = $token->[4];
+	      }
+	    }
+            if ($target eq 'meta') {
+		unless ($token->[2]->{'http-equiv'}) {
+		    my $name=$token->[2]->{'name'};
+                    $name=~tr/A-Z/a-z/;
+                    $name=~s/\s/\_/g;
+                    if ($name) {
+                       $currentstring='<'.$name.'>'.
+                                         $token->[2]->{'content'}.
+			              '</'.$name.'>';
+		    }
+                }
 	    }
 	   return $currentstring;
 	}
-        sub end_meta {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-------------------------------------------------------------------------- <body> tag
+      sub end_meta {
+	my ($target,$token,$tagstack,$parstack,$parser) = @_;
+	my $currentstring = '';
+	if ($target eq 'web') {
+	  my $args='';
+	  if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+	  if ($args ne '') {
+	    $currentstring = $token->[4];
+	  }
+	} 
+	return $currentstring;
+      }
+#-- <body> tag
         sub start_body {
-	    my ($target,$token) = @_;
+            my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+#	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{document} ";  
+	      if (!$Apache::lonxml::registered) {
+		$currentstring.='<head>'.
+		    &Apache::lonxml::registerurl(undef,$target).'</head>';
+	      }
+	      my $onLoad='';
+	      foreach my $key (keys(%{$token->[2]})) {
+		if ($key =~ /^onload$/i) {
+		  $onLoad.=$token->[2]->{$key}.';';
+		  delete($token->[2]->{$key});
+		}
+	      }
+	      $token->[2]->{'onLoad'}=$onLoad.&Apache::lonxml::loadevents();
+	      my $onUnload='';
+	      foreach my $key (keys(%{$token->[2]})) {
+		if ($key =~ /^onunload$/i) {
+		  $onUnload.=$token->[2]->{$key}.';';
+		  delete($token->[2]->{$key});
+		}
+	      }
+	      $token->[2]->{'onUnload'}=$onUnload.
+		&Apache::lonxml::unloadevents();
+
+	      $currentstring .= '<'.$token->[1];
+	      foreach (keys %{$token->[2]}) {
+	      	$currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
+	      }
+	      $currentstring.='>';
+	      if ($ENV{'request.state'} ne 'published') {
+		$currentstring.=(<<EDITBUTTON);
+		<form method="post">
+		<input type="submit" name="showmode" value="Edit" />
+		</form>
+EDITBUTTON
+	      }
+       	    } elsif ($target eq 'tex') {
+              $currentstring = '\begin{document}';  
 	    } 
 	   return $currentstring;
 	}
@@ -242,18 +368,20 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{document}";  
+              $currentstring = '\end{document}';  
 	    } 
 	   return $currentstring;
 	}
-#------------------------------------------------------------------------ <center> tag
+#-- <center> tag
         sub start_center {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{center} ";  
+              $currentstring = '\begin{center}';  
+	    }  elsif ($target eq 'latexsource') {
+              $currentstring = '\begin{center}';  
 	    } 
 	   return $currentstring;
 	}
@@ -263,18 +391,22 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{center}";  
+              $currentstring = '\end{center}';  
+	    }  elsif ($target eq 'latexsource') {
+              $currentstring = '\end{center}';  
 	    } 
 	   return $currentstring;
 	}
-#----------------------------------------------------------------------------- <b> tag
+#-- <b> tag
         sub start_b {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " {\\bf ";  
+              $currentstring = '\textbf{';  
+	    }  elsif ($target eq 'latexsource') {
+              $currentstring = '\textbf{';  
 	    } 
 	   return $currentstring;
 	}
@@ -284,18 +416,23 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = "}";  
+              $currentstring = '}';  
+
+	    } elsif ($target eq 'latexsource') {
+              $currentstring = '}';  
 	    } 
 	   return $currentstring;
 	}
-#------------------------------------------------------------------------ <strong> tag
+#-- <strong> tag
         sub start_strong {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " {\\bf ";  
+              $currentstring = '\textbf{';  
+	    } elsif ($target eq 'latexsource') {
+              $currentstring = '\textbf{';  
 	    } 
 	   return $currentstring;
 	}
@@ -306,19 +443,24 @@ sub BEGIN {
 
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = "}";  
+              $currentstring = '}';  
+	    }  elsif ($target eq 'latexsource') {
+              $currentstring = '}';  
 	    } 
 	   return $currentstring;
 	}
-#---------------------------------------------------------------------------- <h1> tag
+#-- <h1> tag
         sub start_h1 {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\chapter{ ";
-	    } 
+		$currentstring .= '\large{\textbf{';
+	    } elsif ($target eq 'meta') {
+		$currentstring='<subject>';
+                &start_output();
+            }
            return $currentstring;
 	}
         sub end_h1 {
@@ -327,18 +469,21 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    } 
+		$currentstring .= '}}';
+	    } elsif ($target eq 'meta') {
+                &end_output();
+		$currentstring='</subject>';
+            } 
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <h2> tag
+#-- <h2> tag
         sub start_h2 {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\section{ ";
+		$currentstring .= '\large{\textbf{';
 	    } 
            return $currentstring;
 	}
@@ -348,18 +493,18 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
+		$currentstring .= '}}';
 	    } 
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <h3> tag
+#-- <h3> tag
         sub start_h3 {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\subsection{ ";
+		$currentstring .= '\large{\textbf{';
 	    } 
            return $currentstring;
 	}
@@ -369,18 +514,18 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
+		$currentstring .= '}}';
 	    } 
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <h4> tag
+#-- <h4> tag
         sub start_h4 {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\subsubsection{ ";
+		$currentstring .= '\large{\textbf{';
 	    } 
            return $currentstring;
 	}
@@ -390,18 +535,18 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
+		$currentstring .= '}}';
 	    } 
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <h5> tag
+#-- <h5> tag
         sub start_h5 {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\paragraph{ ";
+		$currentstring .= '\large{\textbf{';
 	    } 
            return $currentstring;
 	}
@@ -411,18 +556,18 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
+		$currentstring .= '}}';
 	    } 
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <h6> tag
+#-- <h6> tag
         sub start_h6 {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\subparagraph{ ";
+		$currentstring .= '\large{\textbf{';
 	    } 
            return $currentstring;
 	}
@@ -432,18 +577,20 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
+		$currentstring .= '}}';
 	    } 
            return $currentstring;
 	}
-#-------------------------------------------------------------------------- <cite> tag
+#--- <cite> tag
         sub start_cite {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\it ";
+		$currentstring .= "\\textit{";
+	    }  elsif ($target eq 'latexsource') {
+		$currentstring .= "\\textit{";
 	    } 
            return $currentstring;
 	}
@@ -454,17 +601,21 @@ sub BEGIN {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
 		$currentstring .= "}";
+	    }  elsif ($target eq 'latexsource') {
+		$currentstring .= "}";
 	    } 
            return $currentstring;
 	}
-#----------------------------------------------------------------------------- <i> tag
+#-- <i> tag
         sub start_i {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\it ";
+		$currentstring .= '\textit{';
+	    }  elsif ($target eq 'latexsource') {
+		$currentstring .= '\textit{';
 	    } 
            return $currentstring;
 	}
@@ -474,18 +625,22 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
+		$currentstring .= '}';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '}';
 	    } 
            return $currentstring;
 	}
-#----------------------------------------------------------------------- <address> tag
+#-- <address> tag
         sub start_address {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\it ";
+		$currentstring .= "\\textit{";
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= "\\textit{";
 	    } 
            return $currentstring;
 	}
@@ -496,17 +651,21 @@ sub BEGIN {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
 		$currentstring .= "}";
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= "}";
 	    }
            return $currentstring;
 	}
-#--------------------------------------------------------------------------- <dfn> tag
+#-- <dfn> tag
         sub start_dfn {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\it ";
+		$currentstring .= "\\textit{";
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= "\\textit{";
 	    } 
            return $currentstring;
 	}
@@ -517,17 +676,21 @@ sub BEGIN {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
 		$currentstring .= "}";
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= "}";
 	    } 
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <tt> tag
+#-- <tt> tag
         sub start_tt {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\tt ";
+		$currentstring .= '\texttt{';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '\texttt{';
 	    } 
            return $currentstring;
 	}
@@ -537,18 +700,22 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    } 
+		$currentstring .= '}';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '}';
+	    }
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <kbd> tag
+#-- <kbd> tag
         sub start_kbd {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\tt ";
+		$currentstring .= "\\texttt";
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= "\\texttt{";
 	    } 
            return $currentstring;
 	}
@@ -559,17 +726,19 @@ sub BEGIN {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
 		$currentstring .= "}";
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= "}";
 	    } 
            return $currentstring;
 	}
-#-------------------------------------------------------------------------- <code> tag
+#-- <code> tag
         sub start_code {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\tt ";
+		$currentstring .= '\texttt{';
 	    } 
            return $currentstring;
 	}
@@ -579,18 +748,20 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
+		$currentstring .= '}';
 	    } 
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <em> tag
+#-- <em> tag
         sub start_em {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\emph ";
+		$currentstring .= '\emph{';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '\emph{';
 	    } 
            return $currentstring;
 	}
@@ -600,19 +771,23 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    } 
+		$currentstring .= '}';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '}';
+	    }  
            return $currentstring;
 	}
-#----------------------------------------------------------------------------- <q> tag
+#-- <q> tag
         sub start_q {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{ \\emph ";
-	    } 
+		$currentstring .= "\\emph{";
+	    }  elsif ($target eq 'latexsource') {
+		$currentstring .= "\\emph{";
+	    }
            return $currentstring;
 	}
         sub end_q {
@@ -622,17 +797,21 @@ sub BEGIN {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
 		$currentstring .= "}";
-	    } 
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= "}";
+	    }  
            return $currentstring;
 	}
-#----------------------------------------------------------------------------- <p> tag
+#-- <p> tag
         sub start_p {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{\\par ";
+		$currentstring .= '{\par ';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '{\par ';
 	    } 
            return $currentstring;
 	}
@@ -642,18 +821,22 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }";
+	        $currentstring .= '}';
+            } elsif ($target eq 'latexsource') {
+	        $currentstring .= '}';
             }
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <br> tag
+#-- <br> tag
         sub start_br {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\\\";
+		$currentstring .= '\\\\';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '\\';
 	    } 
            return $currentstring;
 	}
@@ -665,15 +848,17 @@ sub BEGIN {
 	    }
            return $currentstring;
 	}
-#--------------------------------------------------------------------------- <big> tag
+#-- <big> tag
         sub start_big {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{\\large ";
-	    } 
+		$currentstring .= '\large{';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '{\Large ';
+	    }  
            return $currentstring;
 	}
         sub end_big {
@@ -682,18 +867,22 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }";
+	        $currentstring .= '}';
+            } elsif ($target eq 'latexsource') {
+	        $currentstring .= '}';
             }
            return $currentstring;
 	}
-#------------------------------------------------------------------------- <small> tag
+#-- <small> tag
         sub start_small {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[4];
 	    } elsif ($target eq 'tex') {
-		$currentstring .= "{\\footnotesize ";
+		$currentstring .= '{\footnotesize ';
+	    } elsif ($target eq 'latexsource') {
+		$currentstring .= '{\footnotesize ';
 	    } 
            return $currentstring;
 	}
@@ -703,20 +892,30 @@ sub BEGIN {
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
 	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }";
+	        $currentstring .= '}';
+            } elsif ($target eq 'latexsource') {
+	        $currentstring .= '}';
             }
            return $currentstring;
 	}
-#---------------------------------------------------------------------- <basefont> tag
+#-- <basefont> tag
       sub start_basefont {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-#-------------------------------------------------------------------------- <font> tag
+	my ($target,$token) = @_;
+	my $currentstring = '';
+	if ($target eq 'web') {
+	  $currentstring = $token->[4];     
+	} 
+	return $currentstring;
+      }
+      sub end_basefont {
+	my ($target,$token) = @_;
+	my $currentstring = '';
+	if ($target eq 'web') {
+	  $currentstring = $token->[4];     
+	} 
+	return $currentstring;
+      }
+#-- <font> tag
          sub start_font {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -733,7 +932,7 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	} 
-#------------------------------------------------------------------------ <strike> tag
+#-- <strike> tag
         sub start_strike {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -754,7 +953,7 @@ sub BEGIN {
             }
            return $currentstring;
 	}
-#----------------------------------------------------------------------------- <s> tag
+#-- <s> tag
         sub start_s {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -775,7 +974,7 @@ sub BEGIN {
             }
            return $currentstring;
 	}
-#--------------------------------------------------------------------------- <sub> tag
+#-- <sub> tag
         sub start_sub {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -796,7 +995,7 @@ sub BEGIN {
             }
            return $currentstring;
 	}
-#--------------------------------------------------------------------------- <sup> tag
+#-- <sup> tag
         sub start_sup {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -817,7 +1016,7 @@ sub BEGIN {
             }
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <hr> tag
+#-- <hr> tag
         sub start_hr {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -828,7 +1027,16 @@ sub BEGIN {
 	    } 
            return $currentstring;
 	}
-#----------------------------------------------------------------------------- <a> tag
+        sub end_hr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= $token->[2];
+	    } elsif ($target eq 'tex') {
+	    } 
+           return $currentstring;
+	}
+#-- <a> tag
         sub start_a {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -839,7 +1047,7 @@ sub BEGIN {
            return $currentstring;
 	}
         sub end_a {
-	    my ($target,$token,$stackref) = @_;
+	    my ($target,$token,$tagstack,$stackref) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
 	       $currentstring .= $token->[2];
@@ -847,7 +1055,7 @@ sub BEGIN {
                 my  $tempor_var = $stackref->[$#$stackref];
 		if (index($tempor_var,'name') != -1 ) {
 		    $tempor_var =~ s/name=([^,]*),/$1/g;
-	        $currentstring .= " \\label{$tempor_var}";
+#	        $currentstring .= " \\label{$tempor_var}";
 	        } elsif (index($tempor_var,'href') != -1 ) {
 		    $tempor_var =~ s/href=([^,]*),/$1/g;
 	        $currentstring .= " \\ref{$tempor_var}";
@@ -855,19 +1063,23 @@ sub BEGIN {
             }
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <li> tag
+#-- <li> tag
         sub start_li {
-	    my ($target,$token,$stackref) = @_;
+	    my ($target,$token,$tagstack,$stackref) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-                my  $tempor_var = $stackref->[$#$stackref-1];
+                my  $tempor_var = $stackref->[$#$stackref];
                 if (index($tempor_var,'circle') != -1 ) {
 	          $currentstring .= " \\item[o] ";
 	        } elsif (index($tempor_var,'square') != -1 ) {
 	               $currentstring .= " \\item[$\Box$] ";
-	        } else {
+	        } elsif ($tempor_var ne '') { 
+		       $_ = $tempor_var;
+                       m/my\s*([^=]*)=/;
+		       $currentstring .= " \\item[$1] ";
+		} else {
 		    $currentstring .= " \\item ";
 	        }  
 	    } 
@@ -881,7 +1093,7 @@ sub BEGIN {
 	    } 
 	   return $currentstring;
 	}
-#----------------------------------------------------------------------------- <u> tag
+#-- <u> tag
         sub start_u {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -902,14 +1114,14 @@ sub BEGIN {
             }
            return $currentstring;
 	}
-#---------------------------------------------------------------------------- <ul> tag
+#-- <ul> tag
         sub start_ul {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{itemize} ";  
+              $currentstring = '\begin{itemize}';  
 	    } 
 	   return $currentstring;
 	}
@@ -919,11 +1131,11 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{itemize}";  
+              $currentstring = '\end{itemize}';  
 	    } 
 	   return $currentstring;
 	}
-#-------------------------------------------------------------------------- <menu> tag
+#-- <menu> tag
         sub start_menu {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -944,7 +1156,7 @@ sub BEGIN {
 	    } 
 	   return $currentstring;
 	}
-#--------------------------------------------------------------------------- <dir> tag
+#-- <dir> tag
         sub start_dir {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -965,14 +1177,14 @@ sub BEGIN {
 	    } 
 	   return $currentstring;
 	}
-#---------------------------------------------------------------------------- <ol> tag
+#-- <ol> tag
         sub start_ol {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{enumerate} ";  
+              $currentstring = '\begin{enumerate}';  
 	    } 
 	   return $currentstring;
 	}
@@ -982,18 +1194,18 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{enumerate}";  
+              $currentstring = '\end{enumerate}';  
 	    } 
 	   return $currentstring;
 	}
-#---------------------------------------------------------------------------- <dl> tag
+#-- <dl> tag
         sub start_dl {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{description} ";  
+              $currentstring = '\begin{description}';  
 	    } 
 	   return $currentstring;
 	}
@@ -1003,18 +1215,18 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{description}";  
+              $currentstring = '\end{description}';  
 	    } 
 	   return $currentstring;
 	}
-#---------------------------------------------------------------------------- <dt> tag
+#-- <dt> tag
         sub start_dt {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = "\\item[ ";  
+              $currentstring = '\item[';  
 	    } 
 	   return $currentstring;
 	}
@@ -1024,11 +1236,11 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];    
             } elsif ($target eq 'tex') {
-              $currentstring = "]";  
+              $currentstring = ']';  
 	    } 
 	   return $currentstring;
 	}
-#---------------------------------------------------------------------------- <dd> tag
+#-- <dd> tag
         sub start_dd {
 	    my ($target,$token) = @_;
             my $currentstring = '';
@@ -1045,14 +1257,14 @@ sub BEGIN {
             } 
 	   return $currentstring;
 	}
-#------------------------------------------------------------------------- <table> tag
+#-- <table> tag
         sub start_table {
 	    my ($target,$token) = @_;
             my $currentstring = '';
             if ($target eq 'web') {
               $currentstring = $token->[4];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{tabular} ";  
+              $currentstring = '';  
 	    } 
 	   return $currentstring;
 	}
@@ -1062,10 +1274,270 @@ sub BEGIN {
             if ($target eq 'web') {
               $currentstring = $token->[2];     
 	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{tabular}";  
+              $currentstring = '';  
+	    } 
+	   return $currentstring;
+	}
+#-- <tr> tag
+        sub start_tr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } elsif ($target eq 'tex') {
+	      $currentstring = '';
+	    } 
+	   return $currentstring;
+	}
+        sub end_tr {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];     
+	    } elsif ($target eq 'tex') {
+              $currentstring = '';  
+	    } 
+	   return $currentstring;
+	}
+#-- <td> tag
+        sub start_td {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];
+	    } elsif ($target eq 'tex') {
+	      $currentstring = '';
 	    } 
 	   return $currentstring;
 	}
+        sub end_td {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];
+	    } elsif ($target eq 'tex') {
+              $currentstring = '';
+	    }
+	   return $currentstring;
+	}
+#-- <img> tag
+        sub start_img {
+	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
+                                        $token->[2]->{'src'};
+            my $currentstring = '';
 
+	    if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } elsif ($target eq 'tex') {
+	      my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval);
+	      my $file;
+	      my $path;
+              if ($src =~ m!(.*)/([^/]*)$!) {
+		$file = $2;
+		$path = $1;
+		if ($path=~m:^/:) {
+		  $path = '/home/httpd/html'.$path;
+		} elsif ($path =~ /^\./) {
+		  $path = $Apache::lonxml::pwd[-1].'/'.$path;
+		} else {
+		  #else it is a full url don't print
+		  $path = undef;
+		}
+	      } else {
+		$path = $Apache::lonxml::pwd[-1];
+		$file = $src;
+	      }
+	      $file=~s/(\.gif|\.jpg)$/\.eps/;
+	      if ($path) {
+		$currentstring = '\graphicspath{{'.$path.'/}}\fbox{\includegraphics{'.$file.'}}';
+	      } else {
+		$currentstring = 'See the image at \tt{'.$src.'}';
+	      }
+	    }
+	    return $currentstring;
+	}
+        sub end_img {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];
+	    } elsif ($target eq 'tex') {
+              $currentstring = '';
+	    }
+	   return $currentstring;
+	}
+#-- <applet> tag
+
+        sub start_applet {
+	    my ($target,$token) = @_;
+              $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
+                                        $token->[2]->{'code'};
+              $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
+                                        $token->[2]->{'archive'};
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $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}";
+    } 
+    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 $currentstring;
+}
+        sub end_embed {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];     
+	    } elsif ($target eq 'tex') {
+              $currentstring = " \\end{figure}";  
+	    } 
+	   return $currentstring;
+	}
+
+#-- <param> tag
+
+        sub start_param {
+	    my ($target,$token) = @_;
+	    if ($token->[2]->{'name'} eq 'cabbase') {
+                      $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
+					     $token->[2]->{'value'};
+            }   
+            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
+                                        $token->[2]->{'src'};
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[4];     
+	    } elsif ($target eq 'tex') {
+              $currentstring = " \\begin{figure} ";  
+	    } 
+	   return $currentstring;
+	}
+        sub end_param {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+              $currentstring = $token->[2];     
+	    } elsif ($target eq 'tex') {
+              $currentstring = " \\end{figure}";  
+	    } 
+	   return $currentstring;
+	}
+
+#-- <allow> tag
+
+        sub start_allow {
+	    my ($target,$token) = @_;
+
+            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
+                                        $token->[2]->{'src'};
+
+	   return '';
+	}
+        sub end_allow {
+	   return '';
+	}
+#-- Frames
+	sub start_frameset {
+	  my ($target,$token) = @_;
+	  my $currentstring = '';
+	  if ($target eq 'web') { 
+	    if (!$Apache::lonxml::registered) {
+	      $currentstring.='<head>'.
+		  &Apache::lonxml::registerurl(undef,$target).'</head>';
+	    }
+	    $currentstring .= $token->[4];
+	  }
+	  return $currentstring;
+	}
+        sub end_frameset {
+	  my ($target,$token) = @_;
+	  my $currentstring = '';
+	  if ($target eq 'web') {
+	    $currentstring = $token->[2];
+	  }
+	  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);
+	       $currentstring .= '<b>'.$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);
+	       $currentstring .= '<b>'.$display.'</b>';;
+	    }
+           return $currentstring;
+	}
+        sub end_externallink {
+	    my ($target,$token) = @_;
+            my $currentstring = '';
+            if ($target eq 'web') {
+	       $currentstring .= '';
+	    }
+           return $currentstring;
+	}
 1;
 __END__