--- loncom/xml/lonxml.pm	2004/04/12 22:55:59	1.316
+++ loncom/xml/lonxml.pm	2004/05/21 21:07:54	1.318
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.316 2004/04/12 22:55:59 albertel Exp $
+# $Id: lonxml.pm,v 1.318 2004/05/21 21:07:54 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -460,7 +460,7 @@ sub inner_xmlparse {
 	    #clear out any tags that didn't end
 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
 		my $lasttag=$$stack[-1];
-		if ($token->[1] =~ /^$lasttag$/i) {
+		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
 		    &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
 		    last;
 		} else {
@@ -524,6 +524,10 @@ sub inner_xmlparse {
   return $finaloutput;
 }
 
+## 
+## Looks to see if there is a subroutine defined for this tag.  If so, call it,
+## otherwise do not call it as we do not know what it is.
+##
 sub callsub {
   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $currentstring='';
@@ -556,6 +560,10 @@ sub callsub {
 					     $parstack,$parser,$safeeval,
 					     $style);
       } else {
+          if ($target eq 'tex') {
+              # throw away tag name
+              return '';
+          }
 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
 	if ($metamode <1) {
 	  if (defined($token->[4]) && ($metamode < 1)) {
@@ -1047,7 +1055,7 @@ sub afterburn {
            my $anchorname=$_;
 	   my $matchthis=$anchorname;
            $matchthis=~s/\_+/\\s\+/g;
-           $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
+           $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
        }
     }
     if ($ENV{'form.link'}) {
@@ -1055,14 +1063,14 @@ sub afterburn {
            my ($anchorname,$linkurl)=split(/\>/,$_);
 	   my $matchthis=$anchorname;
            $matchthis=~s/\_+/\\s\+/g;
-           $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
+           $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
        }
     }
     if ($ENV{'form.anchor'}) {
         my $anchorname=$ENV{'form.anchor'};
 	my $matchthis=$anchorname;
         $matchthis=~s/\_+/\\s\+/g;
-        $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
+        $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
         $result.=(<<"ENDSCRIPT");
 <script type="text/javascript">
     document.location.hash='$anchorname';