js获取客户端信息

js获取客户端time,cookie,url,ip,refer,user_agent信息：

<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>  
<script type="text/javascript">
window.onload=function(){ 
    gettime();  //js获取当前时间
    getip();    //js获取客户端ip
    geturl();    //js获取客户端当前url
    getrefer();    //js获取客户端当前页面的上级页面的url
    getuser_agent();       //js获取客户端类型
    getcookie()  //js获取客户端cookie
    loadXMLDoc();
}
function gettime(){
    var nowDate = new Date();
    return nowDate.toLocaleString();
}
function geturl(){
    return window.location.href;
}
function getip(){
    return returnCitySN["cip"]+','+returnCitySN["cname"];
}
function getrefer(){
    return document.referrer;
}
function getcookie(){
    return document.cookie;
}
function getuser_agent(){
    return navigator.userAgent;
}
function loadXMLDoc(){  
    var xmlhttp;  
    if (window.XMLHttpRequest){    
        xmlhttp=new XMLHttpRequest();  
    }else{  
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");  
    }  
    xmlhttp.onreadystatechange=function(){  
        if (xmlhttp.readyState==4 && xmlhttp.status==200){  
            //alert(xmlhttp.responseText);
        }  
    }  //http://localhost/git_work/log.php   //http://localhost:8088/log.php
    xmlhttp.open("POST","http://analysis.wml.com:8088/log.php",true);  
    xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");  
    xmlhttp.send("time="+gettime()+"&ip="+getip()+"&url="+geturl()+"&refer="+getrefer()+"&user_agent="+getuser_agent()+"&cookie="+getcookie());  
}  
</script>