<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> js 定时 打印1到20 </TITLE>
<script type="text/javascript" src="assets/plugins/jquery/jquery.min.js"></script>
<body>
<div id="div1">
</div>
</body>
</HTML>
<script>
var n=0;
var max=20;
window.onload=function(){
var timer = setInterval(function(){ //开启定时器
n++;
$("#div1").html(n);
if(n == max)
{
clearInterval(timer); //清除定时器
}
},300);
};
</script>
