countdown.hta

<html>
<head>
<HTA:APPLICATION ID="oHTA"
    APPLICATIONAME="myApp"
    MAXIMIZEBUTTON="no"
    SINGLEINSTANCE="yes"
    BORDER="thin"
    INNERBORDER="no">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Countdown</title>
<script type="text/javascript">
//<![CDATA[
function e(id){return document.getElementById(id);}
function addZeros(a,b){a=String(a);while(a.length<b)a='0'+a;return a;}
var Countdown={
    element: null,
    intervalID: null,
    utc: 0,
    now: 0,
    fps: 1,
    init: function(el){
        this.element = el;
        this.utc = Math.floor(Date.UTC(2012, 11, 21, 11, 12, 0) / 1000);
        this.now = dt2ts(new Date());
        this.start();
    },
    update: function(){
        this.now = dt2ts(new Date());
        var sec = this.utc - this.now;
        this.element.innerHTML = Math.abs(sec) == sec ? formatTime(sec) : 'World didn\'t end, too bad.';
    },
    start: function(){
        if(!this.intervalID)this.intervalID = window.setInterval((function(self){
            return function(){self.update();};
        })(this), 1000 / this.fps);
        this.update();
    },
    stop: function(){if(this.intervalID)window.clearInterval(this.intervalID);}
};
function dt2ts(dt){return Math.floor(dt.getTime()/1000);}
function formatTime(s){
    return addZeros(Math.floor(s / 3600), 2)+':'+
        addZeros(Math.floor((s / 60) % 60), 2)+':'+
        addZeros(Math.floor(s % 60), 2);
}
window.onload=function(){
    var w=240,h=160;
    window.resizeTo(w,h);
    window.moveTo((screen.availWidth/2)-(w/2),(screen.availHeight/2)-(h/2));
    document.oncontextmenu=function(){return false;};
    document.body.onselectstart=function(){return false;};
    Countdown.init(e('countdown'));
};
//]]>
</script>
<style type="text/css">
/*<![CDATA[*/
*{cursor:default;}
body{overflow:auto;font:13px Tahoma;background-color:ButtonFace;}
#page{margin-top:55px;text-align:center;}
/*]]>*/
</style>
</head>
<body>

<div id="page">
    <div id="countdown">&nbsp;</div>
</div>

</body>
</html>