js 倒计时

来源:互联网 发布:李聪明 知乎 编辑:程序博客网 时间:2024/05/18 12:40

javascript写个最简单的倒计时器:

摘自:http://hi.baidu.com/yicheng29/blog/item/e0e87e865c1c593967096e57.html

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>最简单的倒计时器</title>
    <script type="text/javascript" language="javascript">
        var timelong=10;
        function starttimerdo()
        {
            timelong = timelong-1;
            timer1 = window.setTimeout("starttimerdo()",1000);
            document.body.innerHTML="还有"+timelong+"秒";
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <input id="start" type="button" onclick="starttimerdo()" value="开始计时"/>
    </div>
    </form>
</body>
</html>

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