jquery submit function not doing anything

[JohnMerlino]

Hey all,

This for some reason does not trigger alert:

<script>
 $('form').submit(function(){ 
alert('hello'); 
return false; 
});
</script>
<form>
	<input type="text" />
	<input type="submit" />
</form>

Note that I know the jquery library is installed because otherwise firebug would raise undefined function for '$'.

Thanks for response