改变div属性
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
#box{
width:100px;
height:100px;
background:red;
}
</style>
</head>
<body>
<div id="box"></div>
<button onclick="aa()">变高</button>
<button onclick="bb()">变宽</button>
<button onclick="cc()">变色</button>
<button onclick="dd()">重置</button>
<button onclick="ee()">隐藏</button>
<button onclick="ff()">显示</button>
<script type="text/javascript">
var box;
window.onload=function(){
box=document.getElementById('box');
}
function aa(){
box.style.height="400px";
}
function bb(){
box.style.width="400px";
}
function cc(){
box.style.background="pink";
}
function dd(){
box.style.width="100px";
box.style.height="100px";
box.style.backgorund="red";
}
function ee(){
box.style.display="none";
}
function ff(){
box.style.display="block";
}
</script>
</body>
</html>