Trimming a string in javascript

strTrim.js

//Reference
//http://stackoverflow.com/questions/498970/how-do-i-trim-a-string-in-javascript

if (!String.prototype.trim) {
  
  String.prototype.trim=function(){return this.replace(/^\s+|\s+$/g, '');};
  String.prototype.ltrim=function(){return this.replace(/^\s+/,'');};
  String.prototype.rtrim=function(){return this.replace(/\s+$/,'');};
  String.prototype.fulltrim=function(){return this.replace(/(?:(?:^|\n)\s+|\s+(?:$|\n))/g,'').replace(/\s+/g,' ');};
  
}