--- a/lib/js/urweb.js	Sat Nov 21 14:29:35 2009 -0500
+++ b/lib/js/urweb.js	Sat Nov 21 15:48:08 2009 -0500
@@ -487,7 +487,7 @@
 function ts(x) { return x.toString() }
 function bs(b) { return (b ? "True" : "False") }
 
-function sub(s, i) { return s[i]; }
+function sub(s, i) { return s.charAt(i); }
 function suf(s, i) { return s.substring(i); }
 function slen(s) { return s.length; }
 function sidx(s, ch) {
@@ -499,7 +499,7 @@
 }
 function sspn(s, chs) {
   for (var i = 0; i < s.length; ++i)
-    if (chs.indexOf(s[i]) != -1)
+    if (chs.indexOf(s.charAt(i)) != -1)
       return i;
 
   return null;
@@ -550,14 +550,14 @@
 function uf(s) {
   if (s.length == 0)
     return "_";
-  return (s[0] == '_' ? "_" : "")
+  return (s.charAt(0) == '_' ? "_" : "")
         + escape(s).replace(new RegExp ("/", "g"), "%2F").replace(new RegExp ("\\+", "g"), "%2B");
 }
 
 function uu(s) {
-  if (s.length > 0 && s[0] == '_')
+  if (s.length > 0 && s.charAt(0) == '_') {
     s = s.substring(1);
-  else if (s.length >= 3 && s[0] == '%' && s[1] == '5' && (s[2] == 'f' || s[2] == 'F'))
+  } else if (s.length >= 3 && s.charAt(0) == '%' && s.charAt(1) == '5' && (s.charAt(2) == 'f' || s.charAt(2) == 'F'))
     s = s.substring(3);
   return unescape(s.replace(new RegExp ("\\+", "g"), " "));
 }
@@ -657,7 +657,7 @@
 }
 
 function path_join(s1, s2) {
-  if (s1.length > 0 && s1[s1.length-1] == '/')
+  if (s1.length > 0 && s1.charAt(s1.length-1) == '/')
     return s1 + s2;
   else
     return s1 + "/" + s2;
@@ -754,6 +754,8 @@
           }
         }
 
+        xhr.abort();
+
         connect();
       }
       else {