Javascript String util functions

js_string_fn.js

//EndsWith

String.prototype.endsWith = function(str) 
{return (this.match(str+"$")==str)}

//StartsWith

String.prototype.startsWith = function(str) 
{return (this.match("^"+str)==str)}

//Trim

String.prototype.trim = function(){return 
(this.replace(/^[\s\xA0]+/, "").replace(/[\s\xA0]+$/, ""))}