Simple implementation of getting parameters in url through regular expressions

url:

http://xxxx.com?name = Charm & id=123

In js:

var name = getUrlParam("name");

/* Get by Regular url Parameters in */
function getUrlParam(name){
   var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
   var r = window.location.search.substr(1).match(reg);
   if(r!=null)return decodeURI(r[2]); return null;
}