<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>定时器</title>
<script type="text/javascript">
var timer = null;
function begin() {
var date = new Date();
var current_time = date.getFullYear() + '-' + date.getMonth() + '-' + date.getDate() + ' ';
current_time += date.getHours() + ':' + date.getMinutes() + ':' + date.getSeconds();
document.getElementById('current_time').value = current_time;
timer = setTimeout('begin()', 1000);
}
function end() {
clearTimeout(timer); //清除掉定时器对象
}
</script>
</head>
<body>
<input type="text" name="current_time" id="current_time"/><input type="button" value="开始" onclick="begin();">
<input type="button" value="结束" onclick="end();"/><br/>
</body>
</html>