var showDropdown = function(obj, id) {

	var offset = $(obj).cumulativeOffset();
	$(id).setStyle({ position: 'absolute', top: (offset.top + 17) + 'px', left: (offset.left-5) + 'px', 'z-index': 100 } );
	$(id).show();
}

var hideDropdown = function(id) {
		
	$(id).hide();
}