At startup - Uncaught TypeError: Cannot call method '_trigger' of undefined

At startup - Uncaught TypeError: Cannot call method '_trigger' of undefined

I can't even start jquery mobile, the only thing I have is my index file, with my includes, yes my linking is right.

Keep getting a white page and this error in google chrome
 Uncaught TypeError: Cannot call method '_trigger' of undefined 


<!DOCTYPE html>
<html>
<head>
    <title>Collect&amp;GO</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <link rel="stylesheet" type="text/css" href="css/jquery.mobile-1.0a3.css" />
    <script type="text/javascript" src="js/jquery-1.5.1.min.js"></script>
    <script type="text/javascript" src="js/app.js"></script>
    <script type="text/javascript" src="js/jquery.mobile-1.0a3.js"></script>
    
    
</head>
<body>
</body>
</html>