diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index a19ff23c4..d626d0382 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -431,10 +431,10 @@ function scmEntryClick(id, url) {
 }
 
 function randomKey(size) {
-  var chars = new Array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z');
+  var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
   var key = '';
-  for (i = 0; i < size; i++) {
-    key += chars[Math.floor(Math.random() * chars.length)];
+  for (var i = 0; i < size; i++) {
+    key += chars.charAt(Math.floor(Math.random() * chars.length));
   }
   return key;
 }