$(document).ready(function() {
        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: 50, // 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);
    });