<div id="divTimeRemains">xxxx</div> 
<script language="JavaScript" type="text/javascript"> 
String.prototype.leftPad = function(n, s) { 
    ss = s || " "; 
    if (this.length < n) { 
        var ts = new Array(n - 1); 
        ts[n - 1] = this; 
        for (var i = 0; i < n - this.length; i++) { 
            ts[i] = s; 
        } 
        return ts.join(""); 
    } else { 
        return this; 
    } 
} 

Date.prototype.format = function(style) { 
    var o = { 
        "M+" : this.getMonth() + 1, //month 
        "d+" : this.getDate(),      //day 
        "h+" : this.getHours(),     //hour 
        "m+" : this.getMinutes(),   //minute 
        "s+" : this.getSeconds(),   //second 
        "w+" : "\u65e5\u4e00\u4e8c\u4e09\u56db\u4e94\u516d".charAt(this.getDay()),   //week 
        "q+" : Math.floor((this.getMonth() + 3) / 3),  //quarter 
        "S"  : this.getMilliseconds() //millisecond 
    } 
    if (/(y+)/.test(style)) { 
        stylestyle = style.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length)); 
    } 
    for(var k in o){ 
        if (new RegExp("("+ k +")").test(style)){ 
            stylestyle = style.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length)); 
        } 
    } 
    return style; 
}; 

//script's begin... 
var timeEnd = new Date(2008, 10, 24, 18, 0, 0);//填寫到期日 

function showRemainsTime(){ 
    var timeNow = new Date(); 
    var timeRemains = timeEnd - timeNow; 

    var rs = []; 
    rs[rs.length] = "距離"; 
    rs[rs.length] = timeEnd.format("2008年11月24日18點還有："); 
    rs[rs.length] = Math.floor(timeRemains/(1000 * 60 * 60 * 24)); 
    rs[rs.length] = "天"; 
    rs[rs.length] = (Math.floor(timeRemains/(1000 * 60 * 60)) % 24).toString().leftPad(2, "0"); 
    rs[rs.length] = "小時"; 
    rs[rs.length] = (Math.floor(timeRemains/(1000 * 60)) % 60).toString().leftPad(2, "0"); 
    rs[rs.length] = "分"; 
    rs[rs.length] = (Math.floor(timeRemains/1000) % 60).toString().leftPad(2, "0"); 
    rs[rs.length] = "秒"; 

    document.getElementById("divTimeRemains").innerHTML = rs.join(""); 
    setTimeout("showRemainsTime()",1000); 
} 
showRemainsTime(); 
//script's end... 
</script>