I am having trouble getting my jquery to work in wordpress. I have called the script from the functions.php file and I can see it in the header when I view the source.

function reservations_script(){
	wp_register_script('reservations', get_template_directory_uri() . '/js/reservations.js', array('jquery'));
   // enqueue the script
   wp_enqueue_script('reservations');
}
add_action('wp_enqueue_scripts','reservations_script');

I can also see jquery being called in my header of my site

but if I do a simple test in the header, nothing happens

<script type="text/javascript">
$(document).ready(function(){
  alert('test');
});
</script>

I have also tried $jQuery(document)

Got any ideas?