[jQuery] Problem with the first example!

[jQuery] Problem with the first example!


Hmm, This is starting off very well. I followed the instructions on
the jQuery home page to set up an alert.
My code is as follows:
<html>
<head>
<script type="text/javascript" src="jquery_ui.js"></script>
<script type="text/javascript">
     $(document).ready(function(){
        $("a").click(function(event){
        alert("Thanks for visiting!");});
     });
</script>
</head>
<body>
<a href="http://jquery.com/">jQuery</a>
</body>
</html>
I just get an error 'Object Expected'
Help! :D