--- loncom/interface/lonpreferences.pm	2014/02/12 20:29:36	1.211
+++ loncom/interface/lonpreferences.pm	2014/12/12 14:32:09	1.214
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Preferences
 #
-# $Id: lonpreferences.pm,v 1.211 2014/02/12 20:29:36 raeburn Exp $
+# $Id: lonpreferences.pm,v 1.214 2014/12/12 14:32:09 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -183,6 +183,7 @@ sub texenginechanger {
       'change'   => 'Save',
       'exmpl'    => 'Examples',
       'mathjax'  => 'MathJax:',
+      'mathjaxinfo' => 'MathJax provides rendered equations whose source code can be extracted in TeX and MathML formats by right clicking the equation.',
       'jsmath'   => 'jsMath:',
       'tth'      => 'tth (TeX to HTML):',
       'mimetex'  => 'mimetex (Convert to Images):',
@@ -219,10 +220,10 @@ $lt{'exmpl'}
 
 <h3>$lt{'mathjax'}</h3>
 </script>
-<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=MathJax" width="400" height="120"></iframe>
+<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=MathJax" width="400" height="150"></iframe>
 </p>
 <p>
-MathJax provides rendered equations whose source code can be extracted in TeX and MathML formats by right clicking the equation.
+$lt{'mathjaxinfo'}
 </p>
 
 <h3>$lt{'jsmath'}</h3> 
@@ -234,17 +235,17 @@ if (jsMath.nofonts == 1) {
 }
 
 </script>
-<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=jsMath" width="400" height="120"></iframe>
+<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=jsMath" width="400" height="150"></iframe>
 </p>
 
 <h3>$lt{'mimetex'}</h3>
 <p>
-<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=mimetex" width="400" height="100"></iframe>
+<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=mimetex" width="400" height="150"></iframe>
 </p>
 
 <h3>$lt{'tth'}</h3>
 <p>
-<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=tth" width="400" height="220"></iframe>
+<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=tth" width="400" height="150"></iframe>
 </p>
 ENDLSCREEN
     if ($env{'environment.texengine'} ne 'jsMath') {
@@ -788,7 +789,7 @@ sub lockwarning {
     my $textbottom=&mt('Changing roles or logging out may result in data corruption.');
     my ($num,%which)=&Apache::lonnet::get_locks();
     my $which='';
-    foreach my $id (keys %which) {
+    foreach my $id (keys(%which)) {
        $which.='<li>'.$which{$id}.'</li>';
     }
     my $change=&mt('Override');
@@ -1218,7 +1219,7 @@ sub verify_and_change_colors {
     );
 
     my $message='';
-    foreach my $item (keys %colortypes) {
+    foreach my $item (keys(%colortypes)) {
         my $color=$env{'form.'.$item};
 	if (!($color =~ /^#/)) {
 	    $color = '#' . $color;
@@ -1317,9 +1318,9 @@ sub passwordchanger {
     return if ($currentauth !~ /^(unix|internal):/);
     #
     # Generate keys
-    my ($lkey_cpass ,$ukey_cpass ) = &des_keys();
-    my ($lkey_npass1,$ukey_npass1) = &des_keys();
-    my ($lkey_npass2,$ukey_npass2) = &des_keys();
+    my ($lkey_cpass ,$ukey_cpass ) = &Apache::loncommon::des_keys();
+    my ($lkey_npass1,$ukey_npass1) = &Apache::loncommon::des_keys();
+    my ($lkey_npass2,$ukey_npass2) = &Apache::loncommon::des_keys();
     # Store the keys in the log files
     my $lonhost = $r->dir_config('lonHostID');
     my $logtoken=Apache::lonnet::reply('tmpput:'