jQuery remove waypoint
===

I have an element that slides down when reaching the #news div, and slides up when passing the #news upon sliding up.

    $(document).ready(function() {
	$('#news').waypoint(function(event, direction) {
		if (direction === 'down') {
		$('#menu_list').animate({top: 10},{queue: false, duration:500}) ;}
		else {
		$('#menu_list').animate({top: 50},{queue: false, duration:500}) ;}
           }, {
        offset: '6'  
      });
    });

I would like to know how to apply the " .waypoint('remove')   "  ? In order to make it slide up when leaving the div when sliding even futher down the site and going into other div. 
This way I could make animation like -  slide in / stop in position / slide out.  

If waypoints isn't the correct plugin to do this I would really appreciate some indications how to achieve such effect.

Thanks !
