// html
<span class="time">
距离抢购结束: <span class="red"><span class="t_d"><i>00</i>天</span>
<span class="t_h"><i>00</i>时</span>
<span class="t_m"><i>00</i>分</span>
<span class="t_s"><i>00</i>秒</span></span>
</span>
//倒计时
function getRTime() {
var timestamp = Date.parse(new Date()) / 1000;
var EndTimeTamp = 1474387200; //1472051797
var t = EndTimeTamp - timestamp;
var d = Math.floor(t / 60 / 60 / 24);
var h = Math.floor(t / 60 / 60 % 24);
var m = Math.floor(t / 60 % 60);
var s = Math.floor(t % 60);
// alert(t)
if (t < 0) {
clearInterval(time1);
}
document.getElementById("t_d").innerHTML = d + "天";
document.getElementById("t_h").innerHTML = h + "时";
document.getElementById("t_m").innerHTML = m + "分";
document.getElementById("t_s").innerHTML = s + "秒";
}
var time1 = setInterval(getRTime, 1000);
