CodingForums.com - My 2 jquery dosen't works in page at once.

My code is given below

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Baisithai - Fine Thai food with a lake front view | Michigan Ave. | Chicago, IL</title>
<script src="lightbox/js/prototype.js" type="text/javascript"></script>
<script src="lightbox/js/scriptaculous.js?load=effects" type="text/javascript"></script>
<script src="lightbox/js/lightbox.js" type="text/javascript"></script>

<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/interface.js"></script>

<link href="css/style.css" rel="stylesheet" type="text/css" />
<link rel="stylesheet" href="lightbox/css/lightbox.css" type="text/css" media="screen" />
</head>

Now problem is my jquery for lightbox and menu doesn't works at same time. If I disable 1 of them than other one works nicely. If i tried to use both of them at once, one of them doesn't works.

Please help me to figure out this problem.