function leftTimer(time) {

        var leftTime = (new Date(time)) - (new Date()); //计算剩余的毫秒数

        var days = parseInt(leftTime / 1000 / 60 / 60 / 24, 10); //计算剩余的天数

        var hours = parseInt(leftTime / 1000 / 60 / 60 % 24, 10); //计算剩余的小时

        var minutes = parseInt(leftTime / 1000 / 60 % 60, 10); //计算剩余的分钟

        var seconds = parseInt(leftTime / 1000 % 60, 10); //计算剩余的秒数

        days = checkTime(days);

        hours = checkTime(hours);

        minutes = checkTime(minutes);

        seconds = checkTime(seconds);

        return days + "天" + hours + "小时" + minutes + "分" + seconds + "秒";

    }

    function checkTime(i) { //将0-9的数字前面加上0，例1变为01

        if (i < 10) {

            i = "0" + i;

        }

        return i;

    }

//HTML反转义

function HTMLDecode(text) {

var temp = document.createElement("div");

temp.innerHTML = text;

var output = temp.innerText || temp.textContent;

temp = null;

return output;

}

var tagText = "<p><b>123&456</b></p>";

var encodeText = HTMLEncode(tagText);

console.log(encodeText);//&lt;p&gt;&lt;b&gt;123&amp;456&lt;/b&gt;&lt;/p&gt;

console.log(HTMLDecode(encodeText)); //<p><b>123&456</b></p>

//HTML转义

function HTMLEncode(html) {

var temp = document.createElement("div");

(temp.textContent != null) ? (temp.textContent = html) : (temp.innerText = html);

var output = temp.innerHTML;

temp = null;

return output;

}

var tagText = "<p><b>123&456</b></p>";

console.log(HTMLEncode(tagText));//&lt;p&gt;&lt;b&gt;123&amp;456&lt;/b&gt;&lt;/p&gt;