$.preloadImages(

    "/images/nav/nav_print_off.jpg", "/images/nav_print_on.jpg",
    "/images/nav/nav_web_off.jpg", "/images/nav/nav_web_on.jpg",
    "/images/nav/nav_illustrator_off.jpg", "/images/nav/nav_illustrator_on.jpg",
    "/images/nav/nav_logo_off.jpg", "/images/nav/nav_logo_on.jpg",
    "/images/nav/nav_photo_off.jpg", "/images/nav/nav_photo_on.jpg",
    "/images/nav/nav_writer_off.jpg", "/images/nav/nav_writer_on.jpg"
);


$(document).ready(function() {
    $('#nav_print').hover(
        function() {
            $(this).attr({ src : '/images/nav/nav_print_on.jpg'});
        },

        function(){
            $(this).attr({ src : '/images/nav/nav_print_off.jpg'});
        }
    );

    $('#nav_web').hover(
        function() {
            $(this).attr({ src : '/images/nav/nav_web_on.jpg'});
        },

        function(){
            $(this).attr({ src : '/images/nav/nav_web_off.jpg'});
        }
    );

    $('#nav_illustrator').hover(
        function() {
            $(this).attr({ src : '/images/nav/nav_illustrator_on.jpg'});
        },

        function(){
            $(this).attr({ src : '/images/nav/nav_illustrator_off.jpg'});
        }
    );

    $('#nav_logo').hover(
        function() {
            $(this).attr({ src : '/images/nav/nav_logo_on.jpg'});
        },

        function(){
            $(this).attr({ src : '/images/nav/nav_logo_off.jpg'});
        }
    );

    $('#nav_photo').hover(
        function() {
            $(this).attr({ src : '/images/nav/nav_photo_on.jpg'});
        },

        function(){
            $(this).attr({ src : '/images/nav/nav_photo_off.jpg'});
        }
    );

    $('#nav_writer').hover(
        function() {
            $(this).attr({ src : '/images/nav/nav_writer_on.jpg'});
        },

        function(){
            $(this).attr({ src : '/images/nav/nav_writer_off.jpg'});
        }
    );
});