//获取url参数
    function GetQueryString(name) {
        var reg = new RegExp("(^|\\?)" + name + "=([^&]*)(&|$)");
        var scripts = document.getElementsByTagName('script');
        var Getscriptssrc = "";
        for (var i = 0; i < scripts.length; i++) {
            var scriptssrc = scripts[i].src;
            if (scriptssrc.indexOf("mystat.aspx") > -1) {
                Getscriptssrc = scriptssrc;
                break;
            }
        }
        if (Getscriptssrc != "") {
            var r = Getscriptssrc.match(reg);
            if (r != null) return unescape(r[2]);
        }
        return null;
    }

    var mystatUParam = GetQueryString("u");
    if(mystatUParam==undefined)
        mystatUParam = GetQueryString("U");
    if (mystatUParam == undefined)
        mystatUParam = "{ID}4020";
    var uparam=escape(mystatUParam);
    var titleparam=escape(document.title);
    var refererparam=escape(document.referrer)   
    if(refererparam.length>300)
        refererparam=refererparam.substring(0,299); 
    if(titleparam.length>400)
        titleparam=titleparam.substring(0,399);


document.write("<iframe style='width: 0px; height: 0px; display:none; ' "+"src='https://www.cn-america.cn/asyncstat.aspx?u=" + uparam + "&referer=" + refererparam + "&title=" + titleparam + "'></iframe>");