<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript">
function showClock(){
var today = new Date()
var display=document.getElementById("display")
display.innerHTML=today.toLocaleString()
timer = window.setTimeout("showClock()",1000);
}
</script>
</head>
<body>
<p>
<input type="submit" name="Submit" value="开始" onClick="showClock()">
<input type="submit" name="submit2" value="停止" onclick="window.clearTimeout(timer);">
</p>
<div id="display"></div>
</body>
</html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript">
function showClock(){
var today = new Date()
var display=document.getElementById("display")
display.innerHTML=today.toLocaleString()
timer = window.setTimeout("showClock()",1000);
}
</script>
</head>
<body>
<p>
<input type="submit" name="Submit" value="开始" onClick="showClock()">
<input type="submit" name="submit2" value="停止" onclick="window.clearTimeout(timer);">
</p>
<div id="display"></div>
</body>
</html>