$(function(){
	initDropdown();
})

function initDropdown(){
	var _hoverClass = 'hover';
	var _animSpeed = 500;
	$('#navigation').each(function(){
		var _holder = $(this);
		var _links = $('>li', _holder);
		
		_links.each(function(){
			var _link = $(this);
			var _drop = false;
			if (_link.find('.drop').length) {
				_drop = _link.find('.drop');
				_drop.data('height', _drop.height());
				_drop.data('top', _link.height() - 1);
				function resetDrop(){
					if ($.browser.msie){
						_drop.css({
							'display': 'block',
							'top': -99999,
							'height':0
						});
					}
					else _drop.css({
							'display': 'block',
							'top': -99999,
							'height':0,
							'opacity':0.5
						});
				}
				setTimeout(resetDrop, 500);
			}
			
			_link.mouseenter(function(){
				_link.addClass(_hoverClass);
				if (_drop){
					_drop.css('top', _drop.data('top'))
					if ($.browser.msie)
						_drop.stop().animate({
							'height':_drop.data('height')
						}, _animSpeed)
						else _drop.stop().animate({
							'opacity' : 1,
							'height':_drop.data('height')
						}, _animSpeed);
				}
			}).mouseleave(function(){
				if (_drop){
					_drop.hide();
					resetDrop();
					_link.removeClass(_hoverClass);
				}
				if (!_drop) _link.removeClass(_hoverClass);
			});
		})
	})
}