Js改变样式
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
#box{
width:100px;
height:100px;
background:red;
}
</style>
</head>
<body>
<div id="box"></div>
<input type="button"value="height"onclick="aa()">
<input type="button"value="width"onclick="bb()">
<input type="button"value="color"onclick="cc()">
<input type="button"value="back"onclick="dd()">
<input type="button"value="move"onclick="ee()">
<input type='button'value='show'onclick='ff()'>
</body>
</html>
<script>
var box;
window.onload=function(){
box=document.getElementById('box')
}
function aa(){
box.style.height="500px";
}
function bb(){
box.style.width="500px";
}
function cc(){
box.style.background="yellow";
}
function dd(){
box.style.height="100px";
box.style.width="100px";
box.style.background="red";
}
function ee(){
box.style.display="none";
}
function ff(){
box.style.display="block";
}
</script>