function readCookie(name) {
    var cookieValue = "";
    var search = name + "=";
    if (document.cookie.length > 0) {
        offset = document.cookie.indexOf(search);
        if (offset != -1) {
            offset += search.length;
            cookieend = document.cookie.indexOf(";", offset);
            if (cookieend == -1) cookieend = document.cookie.length;
            cookieValue = unescape(document.cookie.substring(offset, cookieend));
        }
    }
    return cookieValue;
}
//24*30*12//name为cookie名称,value为cookie值,hours为cookie的有效时长
function writeCookie(name, value, hours) {
    var expire = "";
    if (hours != null) {
        expire = new Date((new Date()).getTime() + hours * 3600000);
        expire = "; expires=" + expire.toGMTString();
    }
    //document.cookie = name + "=" + escape(value) + expire + ";path=/";
    document.cookie = name + "=" + escape(value) + ";domain=114study.com" + expire + ";path=/";
}

/////function setCookie(name, value, isForever) {
//    document.cookie = name + "=" + escape(value) + ";domain=163.com" + (isForever?";expires="+  (new Date(2099,12,31)).toGMTString():"");
////}
function Request(strName)
 {
     var strHref = window.document.location.href;
     var intPos = strHref.indexOf("?");
     var strRight = strHref.substr(intPos + 1);
     var arrTmp = strRight.split("&");
     for(var i = 0; i < arrTmp.length; i++)
     {
         var arrTemp = arrTmp[i].split("=");
        if(arrTemp[0].toUpperCase() == strName.toUpperCase()) 
            return arrTemp[1];
    }
    return "";
}
function checkCPA() {
    var cid =  Request("cid");
    var wid =  Request("wid");
    var fbt =  Request("fbt");
    if (cid != ""  && wid != "") {
        if (fbt != "") {
            writeCookie("fbt",fbt, 24);
        }
        else {
            writeCookie("fbt", null, 24);
        }
        writeCookie("cid", cid, 24);
        writeCookie("wid", wid, 24);
    }
}

var sCountUrl = "http://www.114study.com/Performance/PerCounter.aspx";
var refer = document.referrer == "" || document.referrer == null ? "http://www.114study.com" : document.referrer;
writeCookie("referurl", refer, 24);

checkCPA();
//var advReferrer = encodeURI(refer) + "";
sCountUrl += "?r=" + Math.random(); //+ "&refer=" + advReferrer;
document.write("<img src=\"" + sCountUrl + "\" style=\"border:0;display:none;\">");