js统计网页在线时间的脚本

每xxxxx毫秒检测一次是否在线,

TR_COUNT次之后设定改用户为假死状态(即不在当前页面活动,afk..)

当页面关闭时把停留时间送出,

/**//* ----------------------------------------------------------------------------

* Script Name: online.js

* Last Modified: 2008-4-13 22:25

* Author: meyu

* Copyright (c) 2008

* Purpose: 跟踪在线时间

* ----------------------------------------------------------------------------*/

function TR_XMLHttpObject(url)...{

    this.XMLHttp=null;

    this.url=url;

    this.init=function()...{

        if(window.XMLHttpRequest)...{

            this.XMLHttp=new XMLHttpRequest();

        }else if(window.ActiveXObject)...{

            this.XMLHttp=new ActiveXObject("Microsoft.XMLHTTP");

        }

    };

    this.init();

    this.sendData=function(param)...{

        with(this.XMLHttp)...{

            open('GET',this.url+(param||''),true);

            send(null);

        }

    };

}

if(/flag=flush/i.test(window.location.search))...{

    var TR_COUNT=0;

    var TR_x=new TR_XMLHttpObject(window.location.href.replace(/&?(?:flush_count=)(d+)/i,

        function(a,d)...{

            TR_COUNT=parseInt(d);

            return "";

            })

    );

    function send()...{

        TR_COUNT++;

        if(TR_COUNT < 120)...{

            TR_x.sendData('&flush_count='+TR_COUNT);

        }

    }

    window.setInterval(send,30000);

    window.onunload=function()...{TR_x.sendData('&flush_count='+TR_COUNT);};

}