$(document).ready(function() {
	$('#nav li').mouseenter(function() {
		//console.log('mouseenter mainNavigation li');
		
		if($(this).children('ul.sub').size() > 0) {
			//console.log('show subNavigation');
			
			$(this).children('ul.sub').show();
		}
	});
	
	$('#nav li').mouseleave(function() {
		//console.log('mouseleave mainNavigation li');
		
		if($(this).children('ul.sub').size() > 0) {
			//console.log('hide subNavigation');
			
			$(this).children('ul.sub').hide();
		}
	});
});