<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
#wrap {
width: 500px;
height: 500px;
background: grey;
display: -webkit-box;
-webkit-box-pack: center;
-webkit-box-align: center;
}
#box{
width: 200px;
height: 200px;
background: deeppink;
}
</style>
</head>
<body>
<div id="wrap">
<div id="box"></div>
</div>
</body>
<script type="text/javascript">
window.onload = function () {
var box = document.getElementById('box');
}
</script>
</html>运行结果
