[jQuery] is not a valid function

[flycast]

This code works if I just have the alert("Hello"); but take out the $
("a").hide("slow");
The code bombs when it hits any jQuery code inside the document ready.
The script loads when I go the that address alone and it is clear that
the document ready function is working. Any ideas?

<script type="text/javascript" src="http://www.domain.com/includes/
jquery-1.2.6.min.js"></script>

<script type="text/javascript">
$(document).ready(function(){
$("a").hide("slow");
alert("Hello");

})//End of document ready function
</script>