var trace_uid = '';
function getQueryString(queryStringName, url)
{
    var returnValue="";
    var URLString= url || new String(document.location);
    var serachLocation=-1;
    var queryStringLength=queryStringName.length;
    do
    {
        serachLocation=URLString.indexOf(queryStringName+"\=");
        if (serachLocation!=-1)
        {
            if ((URLString.charAt(serachLocation-1)=='?') || (URLString.charAt(serachLocation-1)=='&'))
            {
                URLString=URLString.substr(serachLocation);
                break;
            }
            URLString=URLString.substr(serachLocation+queryStringLength+1);
        }
  
    }
    while (serachLocation!=-1)
    if (serachLocation!=-1)
    {
        var seperatorLocation = URLString.indexOf("&");
        if(seperatorLocation == -1)
            seperatorLocation = URLString.indexOf("#");
        if (seperatorLocation==-1)
        {
            returnValue=URLString.substr(queryStringLength+1);
        }
        else
        {
            returnValue=URLString.substring(queryStringLength+1,seperatorLocation);
        } 
    }
    return returnValue;
}
function isTryNum(uid){
    var iuid = parseInt(uid);
    return uid.length == 9 && iuid > 170000000;
    return uid.length == 9 && (uid.substr(0, 2) == '18' || uid.substr(0, 2) == '17' );
}
/*
var huid = getQueryString('uid') || getQueryString('personid') || getQueryString('userid');
if(huid && huid != trace_uid)
{   
    if(!trace_uid || (isTryNum(huid) && isTryNum(trace_uid)) || !isTryNum(huid))
    {
        trace_uid = huid;
        document.write("<img src='http://trace.compass.cn/umark.php?uid=" + huid + "' width='1px' height='0px' />"); 
    }
}*/

var rex = /(\.rar)|(\.zip)|(\.pdf)|(\.block)|(\.dat)|(\.doc)|(\.docx)|(\.xls)|(\.xlsx)|(\.ppt)|(\.pptx)|(\.exe)|(\.apk)$/i;
//var comdomain = /(\.compass.cn)|(.hmj666.com)$/i;
function checkAParams(){
    
    var alinks = document.getElementsByTagName('a');

    var alen = alinks.length, i = 0;
   
    for(i = 0; i < alen; i ++){
        var alink = alinks[i];
        var href = alink.href;
        var znzfollow = alink.getAttribute('znzfollow');
        if(znzfollow == 'no')
        {
            continue
        }
        if(!href)
            continue
        if(href.substr(0, 5) != 'http:' && href.substr(0, 6) != 'https:')
            continue
        try
        {
            var urlinfo = href.split('?');
            var uriinfo = urlinfo[0];
            if(rex.test(uriinfo.toLowerCase()))
                continue;
        }
        catch(e)
        {
            
        }
        
        var auid = getQueryString('uid', href) || getQueryString('personid', href) || getQueryString('userid', href);
        if(!auid){
            var parts = href.split('?');
            if(parts.length < 2)
            {
                var qh = parts[0].split('#');
                if(qh.length > 1)
                {
                    href = qh[0] + "?personid=" + trace_uid + "#" + qh[1];
                }
                else
                    href = href + "?personid=" + trace_uid;
            }
            else
            {
                var qh = parts[1].split('#');
                href = parts[0] + "?" + qh[0] + "&personid=" + trace_uid;
                if(qh.length > 1)
                    href += "#" + qh[1];
            }
            alink.href =  href;
        }
    }
}

if(trace_uid){
    if (window.addEventListener) {
   
        window.addEventListener('load', checkAParams);
    } else if (window.attachEvent)  {
        window.attachEvent('onload', checkAParams);
    }
}