home_norm = new Image();
home_norm.src = "nav-bars/home.gif";
home_roll = new Image();
home_roll.src = "nav-bars/home-roll.gif";

company_profile_norm = new Image();
company_profile_norm.src = "nav-bars/company-profile.gif";
company_profile_roll = new Image();
company_profile_roll.src = "nav-bars/company-profile-roll.gif";

destinations_norm = new Image();
destinations_norm.src = "nav-bars/destinations.gif";
destinations_roll = new Image();
destinations_roll.src = "nav-bars/destinations-roll.gif";

tours_norm = new Image();
tours_norm.src = "nav-bars/tours.gif";
tours_roll = new Image();
tours_roll.src = "nav-bars/tours-roll.gif";

fixed_departures_norm = new Image();
fixed_departures_norm.src = "nav-bars/fixed-departures-offers.gif";
fixed_departures_roll = new Image();
fixed_departures_roll.src = "nav-bars/fixed-departures-offers-rol.gif";

publications_norm = new Image();
publications_norm.src = "nav-bars/publications.gif";
publications_roll = new Image();
publications_roll.src = "nav-bars/publications-roll.gif";

links_norm = new Image();
links_norm.src = "nav-bars/links.gif";
links_roll = new Image();
links_roll.src = "nav-bars/links-roll.gif";

contact_norm = new Image();
contact_norm.src = "nav-bars/contact.gif";
contact_roll = new Image();
contact_roll.src = "nav-bars/contact-roll.gif";

restoration_norm = new Image();
restoration_norm.src = "nav-bars/restoration-projects.gif";
restoration_roll = new Image();
restoration_roll.src = "nav-bars/restoration-projects-roll.gif";

tibet_handbook_norm = new Image();
tibet_handbook_norm.src = "nav-bars/tibet-handbook.gif";
tibet_handbook_roll = new Image();
tibet_handbook_roll.src = "nav-bars/tibet-handbook-roll.gif";

bhutan_handbook_norm = new Image();
bhutan_handbook_norm.src = "nav-bars/bhutan-handbook.gif";
bhutan_handbook_roll = new Image();
bhutan_handbook_roll.src = "nav-bars/bhutan-handbook-roll.gif";

download_booking_norm = new Image();
download_booking_norm.src = "nav-bars/download-booking-form.gif";
download_booking_roll = new Image();
download_booking_roll.src = "nav-bars/download-booking-form-roll.gif";

search_norm = new Image();
search_norm.src = "nav-bars/search.gif";
search_roll = new Image();
search_roll.src = "nav-bars/search-roll.gif";

go_norm = new Image();
go_norm.src = "nav-bars/search-go.gif";
go_roll = new Image();
go_roll.src = "nav-bars/search-go-roll.gif";

function swap(){
if (document.images){
for (var x=0;
x<swap.arguments.length;
x+=2) {
document[swap.arguments[x]].src = eval(swap.arguments[x+1] + ".src");
}
}
}