[svn r11046] Bugfix: .substr(-3) works in Firefox, but not in IE

main/metadata/md_script.js

@@ -552,7 +552,8 @@
 
         function traverseKwObj(node, parlev, num)  // see KWTREE_OBJECT in md_funcs
         {
-            var curlev = parlev + ('00' + (num+1)).substr(-3), kwn = '', html = '';
+            var curlev = '00' + (num+1), kwn = '', html = '';
+            curlev = parlev + curlev.substr(curlev.length-3);
 
             for (i in (names = node.n.split("_")))
                 if (nn = names[i]) { KWDS_ARRAY.push(nn); kwn += ', ' + nn; }