<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>定时任务</title>
</head>
<body>
<p>显示当前时间:</p>
<p id="demo"></p>
<button onclick="myStopFunction()">停止时间</button>
<button onclick="myStartFunction()">开始时间</button>
<script>
var aa = null;
function my(ss) {
if(ss==1){
window.clearInterval(aa);
}else{
aa = window.setInterval(function(){ myTimer() }, 1000);
}
}
function myTimer() {
var d = new Date();
var t = d.toLocaleTimeString();
document.getElementById("demo").innerHTML = t;
}
function myStopFunction() {
my(1);
}
function myStartFunction() {
my();
}
</script>
</body>
</html>
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