function getQueryString(name) {  var reg = new RegExp(name +"=([^&]*)");     var r = window.location.href.match(reg);     if(r!=null)return  unescape(r[1]); return null;}

 

function getQueryString(name) {      var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");    var r = window.location.search.substr(1).match(reg);    if (r != null) {        return unescape(r[2]);    }}