感觉代码都对了，提交也说对了，但是没有效果，求高人指点
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery动画特效</title>
</head>
<body>
<style css="text/css">
div{background-color:red;width:100px;height:100px;margin:80px;position:absolute;left:100px;}
button{width:50px;height:50px;}
</style>
<div></div>
<input type="button" id="btn1" value="左移" />
<input type="button" id="btn2" value="右移" />
<script>
$("#btn1").bind("click",function(){
$("div").animate({right:"+=100px"},3000)
})
$("#btn2").bind("click",function(){
$("div").animate({left:"+=100px"},3000)
})
</script>
</body>
</html>
