function nav(){
$('#main-nav ul li').hover(function() {
	 $(this).find('ul:first').stop().animate({height: '156px', opacity: '100'},{queue:false, duration:200, easing: 'easeInSine'})
	 	}, function() {
	 $(this).find('ul:first').stop().animate({height: '0px', opacity: '0'},{queue:false, duration:100, easing: 'easeInCirc'}) 

});

};
 
$(document).ready(function() {
nav();
});