Problem with “admin_print_scripts”

I am having a problem with inserting some javascript into an admin page I am making. When i try using a js function it says it cant find it. When i check the source code it doesnt seem to have inserted the code into the header. Can anyone help? I am on a tight time constraint. Thanks!

Here is the code.

add_action('admin_print_scripts', 'myplugin_js_admin_header' );
	function myplugin_js_admin_header() // this is a PHP function
	{
		// use JavaScript SACK library for Ajax
		wp_print_scripts( array( 'sack' ));
		?>
		<script type="text/javascript">
		//<![CDATA[
		function ajax_update_slug( position ){
			var mysack = new sack( "<?php bloginfo( 'wpurl' ); ?>/wp-admin/admin-ajax.php" );    

			mysack.execute = 1;
			mysack.method = 'POST';
			mysack.setVar( "action", "updateFeaturedSlug" );
			mysack.setVar( "featuered_position", position );
			mysack.encVar( "cookie", document.cookie, false );
			mysack.onError = function() { alert('Ajax error in looking up elevation' )};
			mysack.runAJAX();

			return true;
		}
		//]]>
		</script>
		<?php
	} // end of PHP function myplugin_js_admin_header