页面初始化加载

//页面初始化加载函数
function addLoadEvent(func){
var oldonload = window.onload;
if (typeof window.onload != 'function'){
window.onload = func;
}
else {
window.onload = function(){
oldonload();
func();
}
}
}

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

addLoadEvent(getUrlParam('tag'));