<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" type="text/css" href="">
<style type="text/css">
div{
width: 100px;
height: 100px;
border: 1px solid #000;
margin: 30px;
}
</style>
</head>
<body>
<div id="box"></div>
<input type="button" value="变高" name="" onclick="he()">
<input type="button" value="变宽" name="" onclick="wd()">
<input type="button" value="变色" name="" onclick="bg()">
<input type="button" value="重置" name="" onclick="cz()">
<input type="button" value="隐藏" name="" onclick="dn()">
<input type="button" value="显示" name="" onclick="db()">
<script type="text/javascript">
var box;
window.onload=function(){
box=document.getElementById('box');
}
function he(){
box.style.height='200px';
}
function wd(){
box.style.width='200px';
}
function bg(){
box.style.background='green';
}
function cz(){
box.style.height='100px';
box.style.width='100px';
box.style.background='#fff';
}
function dn(){
box.style.display='none';
}
function db(){
box.style.display='block';
}
</script>
</body>
</html>
