getUrlParam:function(name) {
var that = this;
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);//这两行代码的意思就是把类似?topic=1&uid=2,对应取出来相应的值,如uid的话就是取出后面的值2,
//r是一个数组,r[2],就是参数某一个的值
if (r != null)
return that.removeHTMLTag(unescape(decodeURI(r[2])));
return null;