Javascript 随机抽奖

开始抽奖 停止抽奖

 

 

Code:

<body>
    <div style="width:365px;height:180px;border:2px solid green" id="names">
    <script>
        for(var i=1;i<=40;i++){
            document.write('<div style="width:45px;height:35px;background:#ccc;float:left;border:2px solid white;text-align:center;padding-top:7px;">'+ i +'</div>')
        }
    </script>        
    </div>
    <a href="javascript:oaction()" style="margin:5px;" >开始抽奖</a>
    <a href="javascript:clearInterval(sh)" style="margin:5px;" >停止抽奖</a>
    <script>
        var names = document.getElementById("names").getElementsByTagName("div");
        var length = names.length;
        var oldNum = 0;
        var sh;
        function run(){
            var num = Math.floor((Math.random()*40));
            names[oldNum].style.background = "#ccc";
            oldNum = num;
            names[num].style.background="green";    
        }        
        
        function oaction(){
            sh=setInterval(run,10)
        }
    </script>
</body>

posted on 2012-04-20 04:24  SkySoot  阅读(1488)  评论(0)  编辑  收藏  举报

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