/**
 * @author Demon
 * 2011.12.05
 * 倒计时
 */
// 元素ID， 商品结束时间 endtime, 当前时间 btime
function time(elem,endtime,btime) {
	this.elem=elem;
	this.endtime=new Date(endtime).getTime();
	this.getId=document.getElementById(this.elem);
	this.btime=new Date(btime).getTime();
	this.reg=/\s+/g;
}
time.prototype.SetTime=function(){
	var _this=this;
	setInterval(function(){
		_this.DownTime();
	},1000)
}
time.prototype.DownTime= function() {
	var leave=parseInt((this.endtime-this.btime)/1000);
	this.btime+=1000;
	var timeBoole=true;
	var day,hour,mints,second;
	if(leave<=0) {
		timeBoole=false;
	}
	if(timeBoole==true) {
		day=parseInt(leave/3600/24)+"天";
		hour=parseInt((leave/3600)%24)+"小时 ";
		mints=parseInt((leave/60)%60)+"分 ";
		second=parseInt(leave%60)+"秒 ";
	} else {
		day=0+"天";
		hour=0+"小时 ";
		mints=0+"分 ";
		second=0+"秒 ";
	}
	TiemText=day+hour+mints+second;
	this.getId.innerHTML=TiemText.replace(this.reg, "");
}