jsp中实现倒计时

jsp：

	<section>还有<b class="day" id="d">10</b>天<b class="hour" id="h">5</b>小时<b class="minute" id="m">5</b>分<b class="second" id="s">5</b>秒</section>

	<script type="text/javascript">
		$(document).ready(xc);
		function xc(){
 			var js_date=${starttime }; //结束时间 可以从数据库中读出来
			var now_date=new Date().getTime(); 
			xc_day=parseInt((js_date-now_date)/1000/60/60/24);
			xc_h=parseInt((js_date-now_date)/1000/60/60-24*xc_day);
			xc_m=parseInt((js_date-now_date)/1000/60-xc_day*24*60-xc_h*60);
			xc_s=parseInt((js_date-now_date)/1000-xc_m*60-xc_h*60*60-xc_day*24*60*60);
			document.getElementById("d").innerHTML=xc_day;
			document.getElementById("h").innerHTML=xc_h;
			document.getElementById("m").innerHTML=xc_m;
			document.getElementById("s").innerHTML=xc_s;
			setTimeout("xc()",1000);
			}
	</script>

java：

	Long starttime = selectionCycle.getStart_time().getTime();
	ServletActionContext.getRequest().setAttribute("starttime ",starttime );