$(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('fade', 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: 450, // number = milliseconds delay before onMouseOut
 out: megaHoverOut // function = onMouseOut callback (REQUIRED)
 };

 $("ul#nav li .sub").css({'opacity':'0'});
 $("ul#nav li").hoverIntent(config);

});