$(document).ready(function() {
    //On Hover Over
    function megaHoverOver(){
        $(this).find(".sub").stop().fadeTo('fast', 1).show(); //Find sub and fade it in
        (function($) {
            //Function to calculate total width of all ul's
            jQuery.fn.calcSubWidth = function() {
                rowWidth = 0;
                //Calculate row
                $(this).find("ul").each(function() { //for each ul...
                    rowWidth += $(this).width(); //Add each ul's width together
                });
            };
        })(jQuery);

        if ( $(this).find(".row").length > 0 ) { //If row exists...

            var biggestRow = 0;

            $(this).find(".row").each(function() {	//for each row...
                $(this).calcSubWidth(); //Call function to calculate width of all ul's
                //Find biggest row
                if(rowWidth > biggestRow) {
                    biggestRow = rowWidth;
                }
            });

            $(this).find(".sub").css({
                'width' :biggestRow
            }); //Set width
            $(this).find(".row:last").css({
                'margin':'0'
            });  //Kill last row's margin

        } else { //If row does not exist...

            $(this).calcSubWidth();  //Call function to calculate width of all ul's
            $(this).find(".sub").css({
                'width' : rowWidth
            }); //Set Width

        }
    }
    //On Hover Out
    function megaHoverOut(){
        $(this).find(".sub").stop().fadeTo('fast', 0, function() { //Fade to 0 opactiy
            $(this).hide();  //after fading, hide it
        });
    }

    //Set custom configurations
    var config = {
        sensitivity: 2, // number = sensitivity threshold (must be 1 or higher)
        interval: 1, // number = milliseconds for onMouseOver polling interval
        over: megaHoverOver, // function = onMouseOver callback (REQUIRED)
        timeout: 1, // number = milliseconds delay before onMouseOut
        out: megaHoverOut // function = onMouseOut callback (REQUIRED)
    };

    $("ul#topnav li .sub").css({
        'opacity':'0'
    }); //Fade sub nav to 0 opacity on default
    $("ul#topnav li").hoverIntent(config); //Trigger Hover intent with custom configuration
});