js如何在页面显示倒计时，做一个商品限时

Question

js

Answer 1

<script type="text/javascript">
       function fresh() {
            var d = "2014-05-25";
            var endtime = new Date(d);
            var nowtime = new Date();
            var leftsecond = parseInt((endtime.getTime() - nowtime.getTime()) / 1000);
            d = parseInt(leftsecond / 3600 / 24);
            h = parseInt((leftsecond / 3600) % 24);
            m = parseInt((leftsecond / 60) % 60);
            s = parseInt(leftsecond % 60);
            var td = d * 24 + h;
            $("#emH").html(td);
            $("#emM").html(m);
            $("#emS").html(s);
            if (leftsecond <= 0) {
                    $("#emH").html("00");
                    $("#emM").html("00");
                    $("#emS").html("00");
                clearInterval(sh);
            }
        }
        fresh();
        var sh;
        sh = setInterval(fresh, 1000);  
    </script><div class="hd">
         <div class="floatleft clock">
                   <em id="emH"></em> <strong>:</strong><em id="emM"></em><strong>:</strong><em id="emS"></em>
         </div>
 </div>

Answer 2

我要多个限时的，不过我已经找到你啦，还是要感谢你！
    <script type="text/javascript">
        $(document).ready(function () {
            givetime();
        })
        var endtimes = new Array();//结束时间
        var nowtimes;
        function givetime() {
            endtimes[0] = document.getElementById("times0").attributes["data"].nodeValue;
            endtimes[1] = document.getElementById("times1").attributes["data"].nodeValue;
            endtimes[2] = document.getElementById("times2").attributes["data"].nodeValue;
            endtimes[3] = document.getElementById("times3").attributes["data"].nodeValue;
            var myDate = new Date();
            var month = myDate.getMonth() + 1;
            nowtimes = new Date(month + "/" + myDate.getDate() + "/" + myDate.getFullYear() + " " + myDate.getHours() + ":" + myDate.getMinutes() + ":" + myDate.getSeconds());//当前服务器时间
            window.setTimeout("DownCount()", 1000)
        }
        function DownCount() {
            nowtimes = Number(nowtimes) + 1000;
            for (var i = 0; i <= 3; i++) {
                var theDay = new Date(endtimes[i]);
                theDay = theDay++;
                if (theDay <= nowtimes) {
                    document.getElementById("times" + i).innerHTML = "限购时间：抢购已结束";
                }
                else {
                    timechange(theDay, i);                }
            }
            window.setTimeout("DownCount()", 1000)
        }
        function timechange(theDay, i) {
            var theDays = new Date(theDay);
            var seconds = (theDays - nowtimes) / 1000;
            var minutes = Math.floor(seconds / 60);
            var hours = Math.floor(minutes / 60);
            var days = Math.floor(hours / 24);
            var CDay = days;
            var CHour = hours % 24;
            var CMinute = minutes % 60;
            var CSecond = seconds % 60;
            var CHour = CHour + CDay * 24;
            if (CMinute < 10) {
                CMinute = "0" + CMinute;
            }
            if (CHour < 10) {
                CHour = "0" + CHour;
            }
            if (CSecond < 10) {
                CSecond = "0" + CSecond;
            }
            document.getElementById("times" + i).innerHTML = "限购时间：" + CHour + "小时" + CMinute + "分钟" + CSecond + "秒";
        }
    </script>for (int k = 0; k < kcount; k++)
{
sbnew.Append("<p><div class = \"daojishi\" style=\"float:left;\"><div id = \"times" + k + "\" data= \"" + ("04/30/2014,23:30:00") + "\" style=\"float:left;\"></div></div><br></p>");
}
我这样做的