var realUpdateTime = function(){
    var getTimeInfo = function(remainTime){
        return{
            second:remainTime%60,
            minute:Math.floor(remainTime/60)%60,
            hour:Math.floor(remainTime/3600)%24,
            day:Math.floor(remainTime/86400)
        }
    };

    var updateDIV = function(ele,timeInfo,flag){
		//alert(timeInfo.day);
		if(flag)
		{
        ele.html("距离当前,还有:<em>"+timeInfo.day+"</em>天<em>"+timeInfo.hour+"</em>小时<em>"+timeInfo.minute+"</em>分<em>"+timeInfo.second+"</em>秒");
        }else
        {
        ele.html("<font color=\"green\">团购已结束</font>");
        }
    };

    var updateTime = function(){
        var currentTime = (new Date()).getTime();
		//alert(currentTime);
        $('span.time_div[alt]').each(function(){
            var remainTime = Math.floor(parseInt($(this).attr('alt') - currentTime)/1E3);
            if( remainTime >= 0){
                updateDIV($(this),getTimeInfo(remainTime),true);
            }else{updateDIV($(this),getTimeInfo(remainTime),false);}
        }
        );
    }
    $(document).ready(function(){
        updateTime();
        setInterval(updateTime,1000);
    });
}