function showRemainTime(eid, num) {
    var nD = Math.floor(num / (1000 * 60 * 60 * 24));
    var nH = Math.floor(num / (1000 * 60 * 60)) % 24;
    var nM = Math.floor(num / (1000 * 60)) % 60;
    var nS = Math.floor(num / 1000) % 60;
    document.getElementById(eid).innerHTML = "<b>" + nD + "</b>天<b>" + showNumberTime(nH) + "</b>时<b>" + showNumberTime(nM) + "</b>分<b>" + showNumberTime(nS) + "</b>秒";
    num -= 1000;
    if (num > 1000) {
        setTimeout("showRemainTime('" + eid + "', " + num + ")", 1000);
    } else {
        document.getElementById(eid).innerHTML = "本次抢购已结束，敬请关注下次抢购";
        document.getElementById("txt_" + eid).innerHTML = document.getElementById("txt_" + eid).innerHTML.replace("抢购", "会员");
    }
}
function showNumberTime(num){
	return num.toString().length > 1 ? num.toString() : "0" + num.toString();
}