added back missing trim() method.

See http://www.nabble.com/Sorting-of-projects-tf4371682.html


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@4613 71c3de6d-444a-0410-be80-ed276b4c234a

war/resources/scripts/hudson-behavior.js

@@ -781,4 +781,14 @@ function buildFormTree(form) {
     
 
     return false;
-}
\ No newline at end of file
+}
+
+// this used to be in prototype.js but it must have been removed somewhere between 1.4.0 to 1.5.1
+String.prototype.trim = function() {
+  var temp = this;
+  var obj = /^(\s*)([\W\w]*)(\b\s*$)/;
+  if (obj.test(temp)) { temp = temp.replace(obj, '$2'); }
+  obj = /  /g;
+  while (temp.match(obj)) { temp = temp.replace(obj, " "); }
+  return temp;
+}