$(function() {

    //ANIMATES NAV ON HOVER
    var fadeDuration = 300; //time in milliseconds
    $('.nav img').stop().hover(function() {
    	$(this).animate({ paddingBottom: '4px' }, fadeDuration);
    }, function() {
    	$(this).stop().animate({ paddingBottom: '0px' }, fadeDuration);
    });
    
});