$(document).ready(function() {
	
	//Overlay quando si passa sopra il menu
	$("#menu-categorie").hover(
		function () {
			$(".principale").addClass("toplayer");		
			$(".sub").addClass("toplayer");
			
			var docHeight = $(document).height();
			$("body").append("<div id='overlay'></div>");
			$("#overlay").height(docHeight).css({
				 'position': 'absolute',
				 'filter': 'alpha(opacity=0)',
				 '-moz-opacity': 0.0,
				 '-khtml-opacity': 0.0,
				 'opacity' : 0.0,				 
				 'top': 0,
				 'left': 0,
				 'background-color': 'white',
				 'width': '100%',
				 'z-index': 5000
			  });
			$("#overlay").fadeTo(400, 0.7);
	  	}, 
	  	function () {
			$('#overlay').fadeTo(400, 0.0, function() {
				$("#overlay").remove();
			});
			$(".sub").removeClass("toplayer");
			$(".principale").removeClass("toplayer");		
		}
	);
	
	//Drop down menu					   
	function megaHoverOver(){
		$(this).find(".sub").stop().fadeTo('fast', 1).show();
		//Calculate width of all ul's
		(function($) { 
			jQuery.fn.calcSubWidth = function() {
				rowWidth = 0;
				//Calculate row
				$(this).find("ul").each(function() {					
					rowWidth += $(this).width(); 
				});	
			};
		})(jQuery); 
		if ( $(this).find(".row").length > 0 ) { //If row exists...
			var biggestRow = 0;	
			//Calculate each row
			$(this).find(".row").each(function() {							   
				$(this).calcSubWidth();
				//Find biggest row
				if(rowWidth > biggestRow) {
					biggestRow = rowWidth;
				}
			});
			//Set width
			$(this).find(".sub").css({'width' :biggestRow});
			$(this).find(".row:last").css({'margin':'0'});
		} else { //If row does not exist...
			$(this).calcSubWidth();
			//Set Width
			$(this).find(".sub").css({'width' : rowWidth});
		}
	}
	function megaHoverOut(){ 
	  $(this).find(".sub").stop().fadeTo('fast', 0, function() {
		  $(this).hide(); 
	  });
	}
	var config = {    
		 sensitivity: 2, // number = sensitivity threshold (must be 1 or higher)    
		 interval: 10, // number = milliseconds for onMouseOver polling interval    
		 over: megaHoverOver, // function = onMouseOver callback (REQUIRED)    
		 timeout: 50, // number = milliseconds delay before onMouseOut    
		 out: megaHoverOut // function = onMouseOut callback (REQUIRED)    
	};
	$("ul#topnav li .sub").css({'opacity':'0'});
	$("ul#topnav li").hoverIntent(config);
});

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}