<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript">
function update(){
var dataTime = (new Date()).toLocaleString() + '<br/>';
clock.innerHMTL = dataTime;
}
function stopClock(){
clearInterval(t);
}
function init() {
clock = document.getElementById('clock');
t = setInterval(update,1000);
}
</script>
</head>
<body onload="init()">
<button onclick="stopClock()">停止</button>
<div id="clock"></div>
</body>
</html>
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