var __tmpCookie = "";

(function heartbeat_log()
{
    setTimeout(function(){
        setInterval(function(){

            if(__isCookie && __tmpCookie != document.cookie){

                var t = Date.parse(new Date())/1000;
                cookie.set('_t', t);
                $.post("https://log.yimian.xyz/heartbeat.php",{"fp":fp, "cookie":document.cookie, "tt":t});
                cookie.set('fp',fp);
                __tmpCookie = document.cookie;
            }
    },4000);

    $.post("https://log.yimian.xyz/heartbeat.php",{"ip":ip,"fp":fp,"city":ipCity});
},3000);

// 兼容不同浏览器对document.hidden的支持 
function getHiddenProp() {
    var prefixes = ['webkit', 'moz', 'ms', 'o'];

    // if 'hidden' is natively supported just return it
    if ('hidden' in document) return 'hidden';

    // otherwise loop over all the known prefixes until we find one
    for (var i = 0; i < prefixes.length; i++) {
        if ((prefixes[i] + 'Hidden') in document)
            return prefixes[i] + 'Hidden';
    }

    // otherwise it's not supported
    return null;
}

// // 兼容不同浏览器对document.visibilityState的支持
function getVisibilityState() {
    var prefixes = ['webkit', 'moz', 'ms', 'o'];
    if ('visibilityState' in document) return 'visibilityState';
    for (var i = 0; i < prefixes.length; i++) {
        if ((prefixes[i] + 'VisibilityState') in document)
            return prefixes[i] + 'VisibilityState';
    }
    // otherwise it's not supported
    return null;
}
// 根据上面两个方法对当前浏览器窗口的状态检测
var visProp = getHiddenProp();
var __title = document.title;;
if (visProp) 
{
    var evtname = visProp.replace(/[H|h]idden/, '') + 'visibilitychange';
    document.addEventListener(evtname, function () 
    {
        if(document[getVisibilityState()] == "hidden") document.title = '唔~你去哪了呢';
        if(document[getVisibilityState()] == "visible") {
            document.title = '欢迎回来@_@';
            setTimeout(function(){document.title = __title;}, 2000);
            heartbeat_get();
        }
        //alert(document[getVisibilityState()]);
    }, false);
}


})();