Get URL Parameters.js

String.prototype.getParams = function (search) {
	var params       = null;
  	var paramsObject = new Object();
  
  	if(search && search != ""){
  		params = this.substr(this.indexOf(search) + search.length + 1, this.length);
    
  		return params.substr(0, ((params.indexOf("&") == "-1") ? params.length : params.indexOf("&")));
  	}
  
  	params = this.substr(this.indexOf("?") + 1, this.length).split("&");
  
  	for(i=0; i < params.length; i++){
  		param = params[i].split("=");
  		paramsObject[param[0]] = param[1];
  	}
  
  	return paramsObject;
};

var url = "http://www.google.de?hl=en&test=1&why=because";
var params = url.getParams();

console.log(params); // {hl: "en", test: "1", why: "because"}
console.log(url.getParams("hl")); //en