js 秒表计时器(开始,停止,清零)

<html>

<head>
<script type="text/javascript">
var c=0
var t

function timedCount()
 {

 document.getElementById('txt').value=c
 c=c+1
 t=setTimeout("timedCount()",1000)
 }

function stopCount()
 {
    
     clearTimeout(t)
    
 }
function cs()
{
 
     c=0  
     document.getElementById('txt').value= 0
     
}
 
</script>
</head>

<body>
<form>
<input type="button" value="开始!"  id="start" onClick="timedCount()">
<input type="text" id="txt">
<input type="button" value="停止!" id="end" onClick="stopCount()">
<input type="button" value="清零!" id="ss" onClick="cs()">
</form>
</body>

</html>

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转载自www.cnblogs.com/0826sw/p/11915283.html
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