setTimeout、clearTimeout、setInterval,clearInterval ——小小计时器

先看下效果

话不多说上代码~

<!DOCTYPE HTML>

<html>

    <head>

        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

        <title>计时器</title>

        <script type="text/javascript">

            var num=0;

            var i;

            function clockstart(){

                 document.getElementById('clock').value=num;

                 num++;

                 i=setTimeout("clockstart()",1000);

            }

            function clockstop(){

                clearTimeout(i);

            }

            function clockclear(){

                num=0;

                setTimeout("document.getElementById('clock').value=0",0);

                clearTimeout(i);

            }

        </script>

    </head>

    <body>

        <input type="text" id="clock" /><br/><br/>

        <input type="button" value="开始" onclick="clockstart()" />

        <input type="button" value="停止" onclick="clockstop()" />

        <input type="button" value="复位" onclick="clockclear()" />

    </body>

</html

setTimeout、clearTimeout、setInterval,clearInterval ——小小计时器

代码

<!DOCTYPE HTML>

<html>

    <head>

        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

        <title>秒表</title>

        <script type="text/javascript">

        function clock(){

            var time=new Date();

            var attime=time.getHours()+":"+time.getMinutes()+":"+time.getSeconds();

            document.getElementById('clock').value=attime;

        }

        setInterval("clock()",100);

        </script>

    </head>

    <body>

        <input type="text" id="clock" />

    </body>

</html>

秒客网

setTimeout、clearTimeout、setInterval,clearInterval ——小小计时器

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