页面加载时，我无法让绿色栏向下滑动。谁能告诉我我的代码有什么问题？
HTML
<html>
<head>
<title>
Live Green Plants
</title>
<link rel="stylesheet" type="text/css" href="home.css">
<script src="home.js"></script>
</head>
<body>
<div class="headerBar">
<img src="headerBar.png" width="657" height="34" alt=""/>
</div>
<script type="text/javascript" src="Script/jquery-1.9.2.min.js"></script>
<script type="text/javascript" src="Script/jquery-ui-1.8.18.min.js"></script>
</script>
</body>
</html>
的Javascript
$(document).ready(function(){
$('.headerBar').slideDown('slow');
});