//17kstat beta 1.02 by code-life 2008.11.25 11:18 (email:cxh@17k.com)

var _stat_vid="VISITOR_CLIENT_NO_COOKIE_SUPPORT"; //客户端标识
var _stat_url=""; //网址
var _stat_tit=""; //标题
var _stat_ref=""; //来源
var _stat_res=""; //分辨率
var _stat_lag=""; //语言
var _stat_scd=""; //颜色质量
var _stat_stm=0; //停留时间
var _stat_urv=0; //访问时间
var _stat_stm=0; //停留时间
var _stat_brw=0; //浏览器类型
var _stat_os=0; //操作系统
var _stat_flsh=""; //flash版本

//初始化参数
if(typeof(_stat_owLoadNum) =="undefined" || typeof(_stat_maxLoadNum) =="undefined")
{
    var _stat_owLoadNum = 0; //此脚本当前装载次数
        var _stat_maxLoadNum = 1; //此脚本当前最大装载次数
}

var _stat_domain_array = ['localhost.cn','localhost.com.cn','localhost.com','17k.com','chineseall.com']; //允许执行此脚本的域名列表
var _stat_src_addr = "http://u.log.17k.com"; //此脚本存放域名地址
var _stat_com_default = "17k.com"; //默认来源自己站点
var _stat_cdmn = stat_get_domain(document.location.toString()); //取得当前域名
var _stat_com_expires = 2; //来源存放日期，单位：天
var _stat_history_length = 10; //访问历史记录存放条数

//空函数
function _stat_void()
{
        return ;
}

//判断是否执行函数
function allowExec()
{
        try{
                if(window.frameElement)
                        return false;
                else
                {
                        if(_stat_owLoadNum < _stat_maxLoadNum)
                        {
                                _stat_owLoadNum ++;
                                return true;
                        }
                        else
                                return false;
                }
        }
        catch(e) {return false;}
}

//主函数
function statTracker()
{
        _stat_tit=escape(document.title);
        _stat_url=escape(document.location);
        _stat_ref=escape(document.referrer);
        _stat_flsh=stat_get_flashver();
        var d=new Date();
        var now=d.getTime();
        var _stat_cookie_enabled;
        document.cookie="__stat__test__cookies."+now;
        _stat_cookie_enabled=(document.cookie.indexOf("__stat__test__cookies."+now)!=-1)?true:false; //判断客户端是否允许执行cookie
        if(_stat_url.indexOf("http")!=0)return ;
        var run_flag=1;
        //暂时取消域名限制
        //for(i=0;i<_stat_domain_array.length;i++)
        //{
        //      if(_stat_cdmn==_stat_domain_array[i])
        //      {
        //              run_flag=1;
        //              break;
        //      }
        //}

        if(run_flag==1 && allowExec())
        {
                //用户标识 例：_stat_nid=f79e3f6a0e3709b21b52d677ee1bfdfe,0
                var _ck_str=stat_get_cookie("_stat_nid");
                if(_ck_str==-1)
                {
                        if(_stat_cookie_enabled)
                        {
                                _stat_vid=fetch_visitor_hash();
                                stat_set_cookie_long("_stat_nid",_stat_vid+","+_stat_urv);
                        }
                }
                else
                {
                        var _id_pos=_ck_str.indexOf(",");
                        _stat_vid=_ck_str.substr(0,_id_pos);
                        _stat_urv=_ck_str.substr(_id_pos+1,999);
                        if(_stat_urv!=0&&(now-_stat_urv)>365*86400)
                        {
                                _stat_urv=0;
                                stat_set_cookie_long("_stat_nid",_stat_vid+","+_stat_urv);
                        }
                }

                //来源地址 例：_stat_com=www.17k.com
                var _stat_com=stat_get_cookie("_stat_com");
                if(_stat_com==-1)
                {
                        _stat_com = stat_get_provider(unescape(_stat_url));

                        if(_stat_com==""){
                                if(_stat_ref==""||_stat_ref=="undefined")
                                {
                                        _stat_com = stat_get_domain_name(unescape(_stat_url));
                                }
                                else
                                {
                                        _stat_com = stat_get_domain_name(unescape(_stat_ref));
                                }
                        }

                        if(_stat_cookie_enabled)
                        {
                                var expires=1000*60*60*24*_stat_com_expires;
                                stat_set_cookie_new("_stat_com",_stat_com,expires);
                        }
                }

                //访问地址 例：_stat_vst=1219739073375,|http%3A//www.17k.com|,www.17k.com
                var _stat_vst=stat_get_cookie("_stat_vst");
                var _stat_fnd=-1;
                if(_stat_vst==-1)
                {
                        stat_set_cookie("_stat_vst",now+",|"+_stat_url+"|"+","+_stat_com);
                }
                else
                {
                        var _stat_vst_array=_stat_vst.split(",");
                        _stat_stm=(now-parseInt(_stat_vst_array[0]))/1000;
                        _stat_vst_array[1]=stat_visit_log(_stat_vst_array[1],_stat_url);
                        _stat_vst=now+","+_stat_vst_array[1]+","+_stat_com;
                        stat_set_cookie("_stat_vst",_stat_vst);
                }

                stat_get_navigation_info();
                var _stat_q="_vid="+_stat_vid;
                //_stat_q+="&_tit="+_stat_tit;
                //_stat_q+="&_url="+_stat_url;
                _stat_q+="&_ref="+_stat_ref;
                _stat_q+="&_stm="+_stat_stm;
                _stat_q+="&_res="+_stat_res;
                //_stat_q+="&_scd="+_stat_scd;
                //_stat_q+="&_lag="+_stat_lag;
                _stat_q+="&_brw="+_stat_brw;
                _stat_q+="&_os="+_stat_os;
                //_stat_q+="&_flsh="+_stat_flsh;
                _stat_q+="&_end1";
				_stat_q+="&siteid="+csite_csiteId;	
				
                var _img=new Image();
                _img.src=_stat_src_addr+"/u.log.gif?"+_stat_q;
                _img.onload=function ()
                {
                        _stat_void();
                };
        }
}

function stat_get_navigation_info()
{
        _stat_res="-";
        _stat_scd="-";
        _stat_lag="-";
        _stat_os=0;
        _stat_brw=0;

        if(self.screen)
        {
                _stat_res=screen.width+"x"+screen.height;
                _stat_scd=screen.colorDepth+"-bit";

        }
        else if(self.java)
        {
                var j=java.awt.Toolkit.getDefaultToolkit();
                var s=j.getScreenSize();
                _stat_res=s.width+"x"+s.height;
        }
        if(navigator.language)
        {
                _stat_lag=escape(navigator.language.toLowerCase());
        }
        else if(navigator.browserLanguage)
        {
                _stat_lag=escape(navigator.browserLanguage.toLowerCase());
        }

        var userAgent=navigator.userAgent.toLowerCase().replace(/\s*/g, "");

        //firefox browse
        if(userAgent.indexOf("firefox")>-1) _stat_brw=20; //FireFox
        //opera browse
        else if(userAgent.indexOf("opera")>-1) _stat_brw=30; //Opera
        //other browse
        else if(userAgent.indexOf("tencenttraveler")>-1&&userAgent.indexOf("maxthon")==-1) _stat_brw=51; //TencentTraveler
        else if(userAgent.indexOf("tencenttraveler")>-1&&userAgent.indexOf("maxthon")>-1) _stat_brw=52; //Maxthon
        else if(userAgent.indexOf("safari")>-1) _stat_brw=53; //Safari
        else if(userAgent.indexOf("camino")>-1) _stat_brw=54; //Camino
        else if(userAgent.indexOf("gecko")>-1) _stat_brw=55; //Gecko
        else if(userAgent.indexOf("webkit")>-1) _stat_brw=56; //Webkit
        //ie browse
        else if(userAgent.indexOf("msie7")>-1) _stat_brw=17; //IE7
        else if(userAgent.indexOf("msie6")>-1) _stat_brw=16; //IE6
        else if(userAgent.indexOf("msie5")>-1) _stat_brw=15; //IE6

        //window os
    if(userAgent.indexOf("nt5.3")>-1) _stat_os=12; //Microsoft Windows Vista
    else if(userAgent.indexOf("nt5.2")>-1) _stat_os=14; //Microsoft Windows 2003
    else if(userAgent.indexOf("nt5.1")>-1) _stat_os=11; //Microsoft Windows XP
    else if(userAgent.indexOf("nt5")>-1) _stat_os=13; //Microsoft Windows 2000
    else if(userAgent.indexOf("nt4")>-1) _stat_os=15; //Microsoft Windows NT4
    else if(userAgent.indexOf("98")>-1) _stat_os=16; //Microsoft Windows 98
    else if(userAgent.indexOf("win9x4.90")>-1) _stat_os=17; //Microsoft Windows ME
    else if(userAgent.indexOf("95")>-1) _stat_os=18; //Microsoft Windows 95
        //linux or unix
    else if(userAgent.indexOf("'linux'")>-1) _stat_os=31; //Linux
    else if(userAgent.indexOf("'unix'")>-1) _stat_os=32; //Unix
    else if(userAgent.indexOf("'freebsd'")>-1) _stat_os=33; //FreeBSD
        // other os
    else if(userAgent.indexOf("powerpc")>-1) _stat_os=51; //PowerPC
    else if(userAgent.indexOf("mac")>-1&&userAgent.indexOf("pc")>-1) _stat_os=52; //Mac OS
    else if(userAgent.indexOf("sun")>-1&&userAgent.indexOf("os")>-1) _stat_os=53; //Sun OS
        else if(userAgent.indexOf("teleport")>-1) _stat_os=55; //Teleport Pro
        else if(userAgent.indexOf("flashget")>-1) _stat_os=56; //FlashGet
        else if(userAgent.indexOf("webzip")>-1) _stat_os=57; //WebZip
}

//生成用户标识
function fetch_visitor_hash()
{
        var d=new Date();
        var xy=document.body.clientWidth+":"+document.body.clientHeight;
        var s=str_to_ent(d.getTime()+Math.random()+document.location+document.referrer+screen.width+screen.height+navigator.userAgent+document.cookie+xy);
        return stat_hex_md5(s);
}

//判断是否为合作商来源
function stat_get_provider(curr_location)
{
        curr_location = curr_location.toLowerCase();

        //特殊页面判断
        var pattern=/index0430.*html$/g;
        if(pattern.test(curr_location))
        {
                return "index0430";
        }

        //合作方判断
        var pattern=/_provider=.+/g;
        if(pattern.test(curr_location))
        {
                try{
                        return(curr_location.match("_provider=(.+)")[1]);
                }catch(e){}
        }

        return "";
}

//获取当前访问地址
function stat_get_domain_name(curr_location)
{
        curr_location=curr_location.substr(7);
        var pos_port=curr_location.indexOf(":");
        var pos_bias=curr_location.indexOf("/");

        if(pos_bias==-1)
        {
                pos_bias=curr_location.length;
        }

        var pos_domain_end;
        if(pos_port==-1||pos_port>pos_bias)
        {
                pos_domain_end=pos_bias;
        }
        else
        {
                pos_domain_end=pos_port;
        }

        var domain_name=curr_location.substr(0,pos_domain_end);
        return domain_name;
}

//获取当前访问域名
function stat_get_domain(curr_location)
{
        curr_location=curr_location.substr(7);
        var pos_port=curr_location.indexOf(":");
        var pos_bias=curr_location.indexOf("/");

        if(pos_bias==-1)
        {
                pos_bias=curr_location.length;
        }

        var pos_domain_end;
        if(pos_port==-1||pos_port>pos_bias)
        {
                pos_domain_end=pos_bias;
        }
        else
        {
                pos_domain_end=pos_port;
        }

        var domain_name=curr_location.substr(0,pos_domain_end);
        var arr_domain_name=domain_name.split(".");
        var domain_name_length=arr_domain_name.length;
        var pattern=/^\d+$/g;
        if(pattern.test(arr_domain_name[domain_name_length-1]))
        {
                return domain_name;
        }
        if(arr_domain_name.length<3)
        {
                return domain_name;
        }

        var domain_suffixes=['com','net','org','gov','co'];
        var i,suffix_found=false;
        for(i=0;i<domain_suffixes.length;i++)
        {
                if(arr_domain_name[domain_name_length-2]==domain_suffixes[i])
                {
                        suffix_found=true;
                        break;
                }
        }
        if(!suffix_found)
        {
                return arr_domain_name[domain_name_length-2]+"."+arr_domain_name[domain_name_length-1];
        }
        else
        {
                return arr_domain_name[domain_name_length-3]+"."+arr_domain_name[domain_name_length-2]+"."+arr_domain_name[domain_name_length-1];
        }
}

function stat_set_cookie_long(name,value)
{
        var _stat_epd=new Date();
        _stat_epd.setTime(_stat_epd.getTime()+1000*60*60*24*365*100);
        document.cookie=name+"="+value+"; expires="+_stat_epd.toGMTString()+"; path=/; domain="+_stat_cdmn;
}

function stat_set_cookie(name,value)
{
        var _stat_epd=new Date();
        _stat_epd.setTime(_stat_epd.getTime()+0);
        document.cookie=name+"="+value+"; path=/; domain="+_stat_cdmn;
}

function stat_set_cookie_new(name,value,expires)
{
        if(!expires||expires=="")
        {
                expires=1000*60*60*24*365*1;
        }

        var _stat_epd=new Date();
        _stat_epd.setTime(_stat_epd.getTime()+expires);
        document.cookie=name+"="+value+"; expires="+_stat_epd.toGMTString()+"; path=/; domain="+_stat_cdmn;
}

function stat_get_cookie(name)
{
        var _stat_dc=document.cookie;
        var _stat_cname=name+"=";
        var _stat_clen=_stat_dc.length;
        var _stat_cbegin=0;
        while(_stat_cbegin<_stat_clen)
        {
                var _stat_vbegin=_stat_cbegin+_stat_cname.length;
                if(_stat_dc.substring(_stat_cbegin,_stat_vbegin)==_stat_cname)
                {
                        var _stat_vend=_stat_dc.indexOf(";",_stat_vbegin);
                        if(_stat_vend==-1)_stat_vend=_stat_clen;
                        return unescape(_stat_dc.substring(_stat_vbegin,_stat_vend));
                }
                _stat_cbegin=_stat_dc.indexOf(" ",_stat_cbegin)+1;
                if(_stat_cbegin==0)break;

        }return -1;
}

function stat_get_flashver()
{
        var f="",n=navigator;
        if(n.plugins&&n.plugins.length)
        {
                for(var ii=0;ii<n.plugins.length;ii++)
                {
                        if(n.plugins[ii].name.indexOf('Shockwave Flash')!=-1)
                        {
                                f=n.plugins[ii].description.split('Shockwave Flash ')[1];
                                break;
                        }
                }
        }
        else if(window.ActiveXObject)
        {
                for(var ii=10;ii>=2;ii--)
                {
                        try
                        {
                                var fl=eval("new ActiveXObject('ShockwaveFlash.ShockwaveFlash."+ii+"');");
                                if(fl)
                                {
                                        f=ii+'.0';
                                        break;
                                }
                        }
                        catch(e)
                        {

                        }
                }
        }
        return f;
}

var _stat_hexcase=0;
var _stat_chrsz=8;
function stat_hex_md5(s)
{
        return binl2hex(stat_core_md5(str2binl(s),s.length*_stat_chrsz));
}

function stat_core_md5(x,len)
{
        x[len>>5]|=0x80<<((len)%32);
        x[(((len+64)>>>9)<<4)+14]=len;
        var a=1732584193;
        var b=-271733879;
        var c=-1732584194;
        var d=271733878;
        for(var i=0;i<x.length;i+=16)
        {
                var olda=a;
                var oldb=b;
                var oldc=c;
                var oldd=d;
                a=md5_ff(a,b,c,d,x[i+0],7,-680876936);
                d=md5_ff(d,a,b,c,x[i+1],12,-389564586);
                c=md5_ff(c,d,a,b,x[i+2],17,606105819);
                b=md5_ff(b,c,d,a,x[i+3],22,-1044525330);
                a=md5_ff(a,b,c,d,x[i+4],7,-176418897);
                d=md5_ff(d,a,b,c,x[i+5],12,1200080426);
                c=md5_ff(c,d,a,b,x[i+6],17,-1473231341);
                b=md5_ff(b,c,d,a,x[i+7],22,-45705983);
                a=md5_ff(a,b,c,d,x[i+8],7,1770035416);
                d=md5_ff(d,a,b,c,x[i+9],12,-1958414417);
                c=md5_ff(c,d,a,b,x[i+10],17,-42063);
                b=md5_ff(b,c,d,a,x[i+11],22,-1990404162);
                a=md5_ff(a,b,c,d,x[i+12],7,1804603682);
                d=md5_ff(d,a,b,c,x[i+13],12,-40341101);
                c=md5_ff(c,d,a,b,x[i+14],17,-1502002290);
                b=md5_ff(b,c,d,a,x[i+15],22,1236535329);
                a=md5_gg(a,b,c,d,x[i+1],5,-165796510);
                d=md5_gg(d,a,b,c,x[i+6],9,-1069501632);
                c=md5_gg(c,d,a,b,x[i+11],14,643717713);
                b=md5_gg(b,c,d,a,x[i+0],20,-373897302);
                a=md5_gg(a,b,c,d,x[i+5],5,-701558691);
                d=md5_gg(d,a,b,c,x[i+10],9,38016083);
                c=md5_gg(c,d,a,b,x[i+15],14,-660478335);
                b=md5_gg(b,c,d,a,x[i+4],20,-405537848);
                a=md5_gg(a,b,c,d,x[i+9],5,568446438);
                d=md5_gg(d,a,b,c,x[i+14],9,-1019803690);
                c=md5_gg(c,d,a,b,x[i+3],14,-187363961);
                b=md5_gg(b,c,d,a,x[i+8],20,1163531501);
                a=md5_gg(a,b,c,d,x[i+13],5,-1444681467);
                d=md5_gg(d,a,b,c,x[i+2],9,-51403784);
                c=md5_gg(c,d,a,b,x[i+7],14,1735328473);
                b=md5_gg(b,c,d,a,x[i+12],20,-1926607734);
                a=md5_hh(a,b,c,d,x[i+5],4,-378558);
                d=md5_hh(d,a,b,c,x[i+8],11,-2022574463);
                c=md5_hh(c,d,a,b,x[i+11],16,1839030562);
                b=md5_hh(b,c,d,a,x[i+14],23,-35309556);
                a=md5_hh(a,b,c,d,x[i+1],4,-1530992060);
                d=md5_hh(d,a,b,c,x[i+4],11,1272893353);
                c=md5_hh(c,d,a,b,x[i+7],16,-155497632);
                b=md5_hh(b,c,d,a,x[i+10],23,-1094730640);
                a=md5_hh(a,b,c,d,x[i+13],4,681279174);
                d=md5_hh(d,a,b,c,x[i+0],11,-358537222);
                c=md5_hh(c,d,a,b,x[i+3],16,-722521979);
                b=md5_hh(b,c,d,a,x[i+6],23,76029189);
                a=md5_hh(a,b,c,d,x[i+9],4,-640364487);
                d=md5_hh(d,a,b,c,x[i+12],11,-421815835);
                c=md5_hh(c,d,a,b,x[i+15],16,530742520);
                b=md5_hh(b,c,d,a,x[i+2],23,-995338651);
                a=md5_ii(a,b,c,d,x[i+0],6,-198630844);
                d=md5_ii(d,a,b,c,x[i+7],10,1126891415);
                c=md5_ii(c,d,a,b,x[i+14],15,-1416354905);
                b=md5_ii(b,c,d,a,x[i+5],21,-57434055);
                a=md5_ii(a,b,c,d,x[i+12],6,1700485571);
                d=md5_ii(d,a,b,c,x[i+3],10,-1894986606);
                c=md5_ii(c,d,a,b,x[i+10],15,-1051523);
                b=md5_ii(b,c,d,a,x[i+1],21,-2054922799);
                a=md5_ii(a,b,c,d,x[i+8],6,1873313359);
                d=md5_ii(d,a,b,c,x[i+15],10,-30611744);
                c=md5_ii(c,d,a,b,x[i+6],15,-1560198380);
                b=md5_ii(b,c,d,a,x[i+13],21,1309151649);
                a=md5_ii(a,b,c,d,x[i+4],6,-145523070);
                d=md5_ii(d,a,b,c,x[i+11],10,-1120210379);
                c=md5_ii(c,d,a,b,x[i+2],15,718787259);
                b=md5_ii(b,c,d,a,x[i+9],21,-343485551);
                a=safe_add(a,olda);
                b=safe_add(b,oldb);
                c=safe_add(c,oldc);
                d=safe_add(d,oldd);

        }
        return Array(a,b,c,d);
}

function md5_cmn(q,a,b,x,s,t)
{
        return safe_add(bit_rol(safe_add(safe_add(a,q),safe_add(x,t)),s),b);
}

function md5_ff(a,b,c,d,x,s,t)
{
        return md5_cmn((b&c)|((~b)&d),a,b,x,s,t);
}

function md5_gg(a,b,c,d,x,s,t)
{
        return md5_cmn((b&d)|(c&(~d)),a,b,x,s,t);
}

function md5_hh(a,b,c,d,x,s,t)
{
        return md5_cmn(b^c^d,a,b,x,s,t);
}

function md5_ii(a,b,c,d,x,s,t)
{
        return md5_cmn(c^(b|(~d)),a,b,x,s,t);
}

function safe_add(x,y)
{
        var lsw=(x&0xFFFF)+(y&0xFFFF);
        var msw=(x>>16)+(y>>16)+(lsw>>16);
        return (msw<<16)|(lsw&0xFFFF);
}

function bit_rol(num,cnt)
{
        return (num<<cnt)|(num>>>(32-cnt));}

function str2binl(str)
{
        var bin=new Array();
        var mask=(1<<_stat_chrsz)-1;
        for(var i=0;i<str.length*_stat_chrsz;i+=_stat_chrsz)bin[i>>5]|=(str.charCodeAt(i/_stat_chrsz)&mask)<<(i%32);return bin;
}

function binl2hex(binarray)
{
        var hex_tab=_stat_hexcase?"0123456789ABCDEF":"0123456789abcdef";
        var str="";
        for(var i=0;i<binarray.length*4;i++)
        {
                str+=hex_tab.charAt((binarray[i>>2]>>((i%4)*8+4))&0xF)+hex_tab.charAt((binarray[i>>2]>>((i%4)*8))&0xF);

        }
        return str;
}

function str_to_ent(str)
{
        var result='';
        var i;
        for(i=0;i<str.length;i++)
        {
                var c=str.charCodeAt(i);
                var tmp='';
                if(c>255)
                {
                        while(c>=1)
                        {
                                tmp="0123456789".charAt(c%10)+tmp;
                                c=c/10;
                        }
                        if(tmp=='')
                        {
                                tmp="0";
                        }
                        tmp="#"+tmp;
                        tmp="&"+tmp;
                        tmp=tmp+";";
                        result+=tmp;
                }
                else
                {
                        result+=str.charAt(i);
                }
        }return result;
}

// 删除字符串前后空格
String.prototype.trim = function()
{
        return this.replace(/(^\s*)|(\s*$)/g, "");
}

// 增加访问记录，只保留最后三条。
function stat_visit_log(_visit_url,_curr_url)
{
        var _stat_tmp_array=new Array();
        var _stat_tmp_find=-1;
        var _stat_sit_array=_visit_url.split("|");
        for(i=0;i<_stat_sit_array.length;i++)
        {
                if(_stat_sit_array[i]!="")
                {
                        var _stat_sit=escape(_stat_sit_array[i]);
                        _stat_tmp_array.push(_stat_sit);
                        if(_stat_sit==_curr_url) _stat_tmp_find=i;
                }
        }
        if((_stat_ref==""||_stat_ref=="undefined")&&_stat_tmp_array.length>0) _stat_ref=_stat_tmp_array[_stat_tmp_array.length-1];
        if(_stat_tmp_find==-1) _stat_tmp_array.push(_curr_url);
        while(_stat_tmp_array.length>_stat_history_length) _stat_tmp_array.shift();
        var _stat_tmp_visit_url="|";
        for(i=0;i<_stat_tmp_array.length;i++)
        {
                _stat_tmp_visit_url+=_stat_tmp_array[i]+"|";
        }
        return _stat_tmp_visit_url;
}
function str_to_ent(str)
{
        var result='';
        var i;
        for(i=0;i<str.length;i++)
        {
                var c=str.charCodeAt(i);
                var tmp='';
                if(c>255)
                {
                        while(c>=1)
                        {
                                tmp="0123456789".charAt(c%10)+tmp;
                                c=c/10;
                        }
                        if(tmp=='')
                        {
                                tmp="0";
                        }
                        tmp="#"+tmp;
                        tmp="&"+tmp;
                        tmp=tmp+";";
                        result+=tmp;
                }
                else
                {
                        result+=str.charAt(i);
                }
        }return result;
}

// 删除字符串前后空格
String.prototype.trim = function()
{
        return this.replace(/(^\s*)|(\s*$)/g, "");
}

// 增加访问记录，只保留最后三条。
function stat_visit_log(_visit_url,_curr_url)
{
        var _stat_tmp_array=new Array();
        var _stat_tmp_find=-1;
        var _stat_sit_array=_visit_url.split("|");
        for(i=0;i<_stat_sit_array.length;i++)
        {
                if(_stat_sit_array[i]!="")
                {
                        var _stat_sit=escape(_stat_sit_array[i]);
                        _stat_tmp_array.push(_stat_sit);
                        if(_stat_sit==_curr_url) _stat_tmp_find=i;
                }
        }
        if((_stat_ref==""||_stat_ref=="undefined")&&_stat_tmp_array.length>0) _stat_ref=_stat_tmp_array[_stat_tmp_array.length-1];
        if(_stat_tmp_find==-1) _stat_tmp_array.push(_curr_url);
        while(_stat_tmp_array.length>_stat_history_length) _stat_tmp_array.shift();
        var _stat_tmp_visit_url="|";
        for(i=0;i<_stat_tmp_array.length;i++)
        {
                _stat_tmp_visit_url+=_stat_tmp_array[i]+"|";
        }
        return _stat_tmp_visit_url;
}

//调用主函数
statTracker();