/**
* @description get the param form browser
* @author xf.radish
* @param {String} key the param your want to get
* @return {String}
*/
getUrlParam:function(key){
var reg = new RegExp("(^|&)" + key+ "=([^&]*)(&|$)", "i"),
r = window.location.search.substr(1).match(reg);
if (null != r) return r[2]; return null;
},