--- loncom/interface/lonhtmlcommon.pm	2008/07/07 11:02:05	1.176
+++ loncom/interface/lonhtmlcommon.pm	2008/07/28 05:25:59	1.177
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common html routines
 #
-# $Id: lonhtmlcommon.pm,v 1.176 2008/07/07 11:02:05 foxr Exp $
+# $Id: lonhtmlcommon.pm,v 1.177 2008/07/28 05:25:59 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -68,33 +68,49 @@ use LONCAPA;
 
 =pod
 
-=item dragmath
+=item dragmath_button
 
-Creates a button that will allow dragmath to edit an equation into 
-a specified textbox.
+Creates a button that launches a dragmath popup-window, in which an 
+expression can be edited and pasted as LaTeX into a specified textarea. 
+
+  textarea - Name of the textarea to edit.
+  helpicon - If true, show a help icon to the right of the button.
 
-  textarea - Name of the text area to edit.
 =cut
 
-##############################################
-# TODO: Figure out a way to only emit the mathedit function once.
-#       per html output document.
-#
+sub dragmath_button {
+    my ($textarea,$helpicon) = @_;
+    my $help_text; 
+    if ($helpicon) {
+        $help_text = &Apache::loncommon::help_open_topic('Authoring_Math_Editor');
+    }
+    return <<ENDDRAGMATH;
+                <input type="button" value="Edit Math", onclick="javascript:mathedit('$textarea',document)" />$help_text
+ENDDRAGMATH
+}
+
 ##############################################
 
-sub dragmath {
-    my ($textarea) = @_;
+=pod
 
-    return <<ENDDRAGMATH;
-                <script language="JavaScript">
+=item dragmath_js
+
+Javascript used to open pop-up window containing dragmath applet which 
+can be used to paste LaTeX into a textarea.
+ 
+=cut
+
+sub dragmath_js {
+    return <<ENDDRAGMATHJS;
+                <script type="text/javascript">
                   function mathedit(textarea, doc) {
                      targetEntry = textarea;
-		     targetDoc   = doc;
+                     targetDoc   = doc;
                      newwin  = window.open("/adm/dragmath/applet/EditMathPopup.html","","width=565,height=500,resizable");
                   }
                 </script>
-                <input type="button" value="Edit Math", onclick="javascript:mathedit('$textarea',document)" />
-ENDDRAGMATH
+
+ENDDRAGMATHJS
 }
 
 ##############################################