var ok = false;
if(document.images) {
   ok = true;
   restaurants_over = new Image(163,21);
   restaurants_out = new Image(163,21);
   restaurants_over.src = "images/nav_menu_restaurants_over.gif";
   restaurants_out.src = "images/nav_menu_restaurants.gif";
   groceries_over = new Image(163,21);
   groceries_out = new Image(163,21);
   groceries_over.src = "images/nav_menu_groceries_over.gif";
   groceries_out.src = "images/nav_menu_groceries.gif";
   bakeries_over = new Image(163,21);
   bakeries_out = new Image(163,21);
   bakeries_over.src = "images/nav_menu_bakeries_over.gif";
   bakeries_out.src = "images/nav_menu_bakeries.gif";
   catering_over = new Image(163,21);
   catering_out = new Image(163,21);
   catering_over.src = "images/nav_menu_catering_over.gif";
   catering_out.src = "images/nav_menu_catering.gif";
   organizations_over = new Image(163,21);
   organizations_out = new Image(163,21);
   organizations_over.src = "images/nav_menu_organizations_over.gif";
   organizations_out.src = "images/nav_menu_organizations.gif";
   resources_over = new Image(163,21);
   resources_out = new Image(163,21);
   resources_over.src = "images/nav_menu_resources_over.gif";
   resources_out.src = "images/nav_menu_resources.gif";
}

function menu_over(imageName) {
   if(ok)
      document[imageName].src = eval(imageName+"_over.src");
}

function menu_out(imageName) {
   if(ok)
      document[imageName].src = eval(imageName+"_out.src");
}