(function($) {
	$.fn.dropDownMenu = function() {
		
		var _ID         = '#'+$(this).attr('id');
		var _ddmenuitem = 0;
		
		init();
		
		function init() {
			$(_ID+' > li').bind('mouseover', openDropDownLst);
			$(_ID+' > li').bind('mouseout', closeDropDownLst);
			document.onclick = closeDropDownLst;
		}
		
		function openDropDownLst() {  
			closeDropDownLst();
			_ddmenuitem = $(this).find('ul.dropDownLst').css('visibility', 'visible');
		}

		function closeDropDownLst() { if (_ddmenuitem) { _ddmenuitem.css('visibility', 'hidden'); } }
	}
})(jQuery);