JS取得URL中的参数值

Request = {
    QueryString : function(item){
        var svalue = location.search.match(new RegExp("[\?\&]" + item + "=([^\&]*)(\&?)","i"));
        return svalue ? svalue[1] : svalue;
    }
}

如url = "localhost:8808/index.jsp?param=zhangsan"
则param = Request.QueryString("param");