js中date倒计时

获取倒计时之前，我们不妨先来看怎样获取当前时间吧！！！

function time(){
            var oDate = new Date();
            var year = oDate.getFullYear();
            var month = oDate.getMonth() + 1     ;
            var dDate = oDate.getDate();
            var day = oDate.getDay();
            var house = oDate.getHours();
            var minu = oDate.getMinutes();
            var sec = oDate.getSeconds();
            
            
            switch(day){
                case 1:
                day = '星期一';
                break;
                case 2:
                day = '星期二';
                break;
                case 3:
                day = '星期三';
                break;
                case 4:
                day = '星期四';
                break;
                case 5:
                day = '星期五';
                break;
                case 6:
                day = '星期六';
                break;
                case 0:
                day = '星期日';
                break;
            }
            
            function double( t ){
                if( t < 10 ){
                    t = '0' + t;
                }
                return t;
            }
            
            
            document.body.innerHTML = year + '年' + month +'月'+ dDate + '日  ' + day + ' ' + double(house) +':'+ double(minu) +':' + double(sec);
        }
        time();
        setInterval(time,1000);

获取倒计时

1、实现倒计时功能
2、倒计时结束按钮可被点击，之前不可被点击

    0天 
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#btn{
    text-decoration: none;
    display: block;
    width: 100px;
    height: 35px;
    background: #ccc;
    text-align: center;
    line-height: 35px;
    color: #666;
}
#btn.btn{
    background: red;
    color: #fff;
    font-size: 20px;
    font-weight: bold;
}
即将开抢!

效果图如下：

Paste_Image.png