$(function() {
    var nav = EUROFAB.client.navigation;
    nav.setActiveLink();

    $('.top_nav').hover(
        function() {
            nav.navMousedOver(this);
        },
        function() {
            nav.navMousedOut(this);
    });
})

EUROFAB.namespace('client.navigation');
EUROFAB.client.navigation = function() {
    var defaultPage = 'categories.aspx'; // default page when no url segment

    var onImages = {
        'top_nav_home': new Image().src = 'images/HomeOn.png',
        'top_nav_products': new Image().src = 'images/ProductsOn.png',
        'top_nav_services': new Image().src = 'images/ServicesOn.png',
        'top_nav_gallery': new Image().src = 'images/GalleryOn.png',
        'top_nav_partners': new Image().src = 'images/PartnersOn.png',
        'top_nav_guide': new Image().src = 'images/MeasuringGuideOn.png',
        'top_nav_contact': new Image().src = 'images/ContactOn.png'
    };
    var offImages = {
        'top_nav_home': new Image().src = 'images/HomeOff.png',
        'top_nav_products': new Image().src = 'images/ProductsOff.png',
        'top_nav_services': new Image().src = 'images/ServicesOff.png',
        'top_nav_gallery': new Image().src = 'images/GalleryOff.png',
        'top_nav_partners': new Image().src = 'images/PartnersOff.png',
        'top_nav_guide': new Image().src = 'images/MeasuringGuideOff.png',
        'top_nav_contact': new Image().src = 'images/ContactOff.png'
    };
    var pageLinks = {
        'default.aspx': 'top_nav_home',
        'products.aspx': 'top_nav_products',
        'product.aspx': 'top_nav_products',
        'searchproductcolour.aspx': 'top_nav_products',
        'searchproduct.aspx': 'top_nav_products',
        'searchproductname.aspx': 'top_nav_products',
        'searchproductbook.aspx': 'top_nav_products',
        'categories.aspx': 'top_nav_products',
        'services.aspx' : 'top_nav_services',
        'gallery.aspx': 'top_nav_gallery',
        'partners.aspx' : 'top_nav_partners',
        'measuringguide.aspx': 'top_nav_guide',
        'contact.aspx': 'top_nav_contact'
    };

    function navMousedOver(link) {
        var img = onImages[link.id];

        if (img !== undefined) {
            $('#' + link.id).find('img').attr('src', img);
        }
    };

    function navMousedOut(link) {
        var activePage;
        if ($.url.attr('file') == null)
            activePage = defaultPage;
        else
            activePage = $.url.attr('file').toLowerCase();

        var regEx = new RegExp(activePage, 'i');

        if (link.href.search(regEx) == -1) {
            var img = offImages[link.id];
            if (img !== undefined) {
                $('#' + link.id).find('img').attr('src', img);
            }
        }
    };

    function setActiveLink() {
        var activePage;
        if ($.url.attr('file') == null)
            activePage = defaultPage;
        else
            activePage = $.url.attr('file').toLowerCase();

        var activeLink = pageLinks[activePage];
        if (activeLink !== undefined) {
            var img = onImages[activeLink];
            $('#' + activeLink).find('img').attr('src', img);
        }
    };

    return {
        navMousedOut: navMousedOut,
        navMousedOver: navMousedOver,
        setActiveLink: setActiveLink
    };
} ();