//获取地址栏参数

    //url为空时为调用当前url地址

    //调用方法为 var params = getPatams();

    function getParams(url) {

        var theRequest = new Object();

        if (!url)

            url = location.href;

        if (url.indexOf("?") !== -1)

        {

            var str = url.substr(url.indexOf("?") + 1) + "&";

            var strs = str.split("&");

            for (var i = 0; i < strs.length - 1; i++)

            {

                var key = strs[i].substring(0, strs[i].indexOf("="));

                var val = strs[i].substring(strs[i].indexOf("=") + 1);

                theRequest[key] = val;

            }

        }

        return theRequest;

    }

    var params = getParams();

    //获取地址栏上的userName

    var userName =  params.userName;