$(function(){
		$('.drop-down').hide();
		$('.main-nav li').not('.main-nav li li').hover( // this method is not native, it's overwritten by jquery.event.hover.js
				function() {
						$(this).children('.drop-down').slideDown(340);																																																																																																
				},
				function() {
						$(this).children('.drop-down').slideUp(180);
				}
		);
		// external anchor behavior
		$('a[rel*=external]').click(function() {
				window.open(this.href);
				return false;
		}); 
});