$(function() {
			$(window).scroll(function(){
				var scrollTop = $(window).scrollTop();
				if(scrollTop != 0){
					$('#nav').stop().animate({'opacity':'0.2'},400);
					$('#contentZoneNavAlto').stop().animate({'opacity':'0.2'},400);
					
				}
				else	{
					$('#nav').stop().animate({'opacity':'1'},400);
					$('#contentZoneNavAlto').stop().animate({'opacity':'1'},400);}
			});
			
			$('#nav').hover(
				function (e) {
					var scrollTop = $(window).scrollTop();
					if(scrollTop != 0){
						$('#nav').stop().animate({'opacity':'1'},400);
						$('#contentZoneNavAlto').stop().animate({'opacity':'1'},400);
					}
				},
				function (e) {
					var scrollTop = $(window).scrollTop();
					if(scrollTop != 0){
						$('#nav').stop().animate({'opacity':'0.2'},400);
						$('#contentZoneNavAlto').stop().animate({'opacity':'0.2'},400);
					}
				}
				
				
				
				
				
				
			);
			
			
			
			$('#contentZoneNavAlto').hover(
				function (e) {
					var scrollTop = $(window).scrollTop();
					if(scrollTop != 0){
						$('#nav').stop().animate({'opacity':'1'},400);
						$('#contentZoneNavAlto').stop().animate({'opacity':'1'},400);
					}
				},
				function (e) {
					var scrollTop = $(window).scrollTop();
					if(scrollTop != 0){
						$('#nav').stop().animate({'opacity':'0.2'},400);
						$('#contentZoneNavAlto').stop().animate({'opacity':'0.2'},400);
					}
				}
				
				
				
				
				
				
			);
			
		});