<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.0.0/jquery.min.js"></script>
<style>
div {
width: 200px;
height: 200px;
background-color: blue;
margin: 10px 0;
}
</style>
</head>
<body>
<script>
$(document).ready(function(){
$('#bt1').click(function(){
$('div').animate(
{
width:'400px',
opacity:'.3'
},2000
)
$('div').animate(
{
height:'400px',
opacity:'1'
},2000
)
$('div').animate(
{
width:'200px',
opacity:'.3'
},2000
)
$('div').animate(
{
height:'200px',
opacity:'1'
},2000
)
})
$('#bt2').click(function(){
$('div').stop(true)
})
})
</script>
<button id="bt1">开始</button>
<button id="bt2">停止</button>
<div></div>
</body>
</html>
