--- loncom/html/res/adm/pages/reactionresponse/reaction_editor.html	2004/07/02 09:33:30	1.7
+++ loncom/html/res/adm/pages/reactionresponse/reaction_editor.html	2005/03/29 17:57:52	1.9
@@ -1,7 +1,7 @@
 <!-- Chemical reaction editor developed by Guy Ashkenazi, guy@fh.huji.ac.il-->
 
 <!--
- $Id: reaction_editor.html,v 1.7 2004/07/02 09:33:30 albertel Exp $
+ $Id: reaction_editor.html,v 1.9 2005/03/29 17:57:52 albertel Exp $
 
  Copyright Michigan State University Board of Trustees
 
@@ -135,17 +135,15 @@ function to_html(string) {
     reaction += html_component(reactants[i]);
     reaction += " + ";
   }
-  if (i < reactants.length)
-    reaction += html_component(reactants[i]);
+  reaction += html_component(reactants[i]);
 
   if (products.length > 0) {
-    reaction += "+rightarrow+";
+    reaction += " "+rightarrow+" ";
     for (i = 0; i < products.length-1; i++) {
       reaction += html_component(products[i]);
       reaction += " + ";
     }
-    if (i < products.length)
-      reaction += html_component(products[i]);
+    reaction += html_component(products[i]);
   }
 
   return reaction;
@@ -156,9 +154,13 @@ function html_component(string) {
   var i = 0;
   level = 0;
 
+  var hydrate = string.split('.');
+  if (hydrate.length > 1) 
+    return html_component(hydrate[0]) + "&middot;" + html_component(hydrate[1]);
+      
   for (;string.substring(i,i+1) == ' ';i++)
     ;
-  for (;isDigit(string.substring(i,i+1));i++)
+  for (;isDigit(string.substring(i,i+1)) || string.substring(i,i+1) == '/'; i++) // stoichiometric coefficient
     reactant += string.substring(i,i+1);
   for (;i < string.length;i++)
     reactant +=  html_char(string.substring(i,i+1));
@@ -183,10 +185,14 @@ function html_char(chr) {
   if (level == 1) { // superscript
     if (isDigit(chr))
       return chr.sup();
-    if (chr == '+' || chr == '-') {
+    if (chr == '+') {
       level = 0;
       return chr.sup();
     }
+    if (chr == '-') {
+      level = 0;
+      return "<sup>&minus;</sup>";
+    } 
     if (chr == ' ') {
       level = 0;
       return "";