<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
#container{
width: 400px;
height: 400px;
position: relative;
background: cadetblue;
}
#animate{
width: 50px;
height: 50px;
position: absolute;
background: red;
}
</style>
</head>
<body>
<div id="container">
<div id="animate">
here is DH
</div>
</div>
<button type="button" onclick="myMove()">click</button>
<script >
function myMove(){
var elem=document.getElementById("animate");
var pos=0;
var id=setInterval(frame,5);
function frame(){
if(pos==350){
//停止
clearInterval(id);
}else{
pos++;
elem.style.top=pos+'px';
elem.style.left=pos+'px';
}
}
}
</script>
</body>
</html>
