if (document.images)
{
   sound              = new Image();
   sound.src          = "images/sound.gif";
   sounddown          = new Image();
   sounddown.src      = "images/sound_over.gif";

   video                  = new Image();
   video.src              = "images/video.gif";
   videodown              = new Image();
   videodown.src          = "images/video_over.gif";
   
   lighting              = new Image();
   lighting.src          = "images/lighting.gif";
   lightingdown          = new Image();
   lightingdown.src      = "images/lighting_over.gif";

   events                  = new Image();
   events.src              = "images/events.gif";
   eventsdown              = new Image();
   eventsdown.src          = "images/events_over.gif";
   
   design              = new Image();
   design.src          = "images/design.gif";
   designdown          = new Image();
   designdown.src      = "images/design_over.gif";

   installation                  = new Image();
   installation.src              = "images/installation.gif";
   installationdown              = new Image();
   installationdown.src          = "images/installation_over.gif";

   home               = new Image();
   home.src           = "images/home.gif";
   homedown           = new Image();
   homedown.src       = "images/home_over.gif";

   about                 = new Image();
   about.src             = "images/about.gif";
   aboutdown             = new Image();
   aboutdown.src         = "images/about_over.gif";

   contact              = new Image();
   contact.src           = "images/contact.gif";
   contactdown           = new Image();
   contactdown.src       = "images/contact_over.gif";
   
   clients               = new Image();
   clients.src           = "images/clients.gif";
   clientsdown           = new Image();
   clientsdown.src       = "images/clients_over.gif";

   gear                 = new Image();
   gear.src             = "images/gear.gif";
   geardown             = new Image();
   geardown.src         = "images/gear_over.gif";

   gallery              = new Image();
   gallery.src           = "images/gallery.gif";
   gallerydown           = new Image();
   gallerydown.src       = "images/gallery_over.gif";
   
   press               = new Image();
   press.src           = "images/press.gif";
   pressdown           = new Image();
   pressdown.src       = "images/press_over.gif";

   seminars                 = new Image();
   seminars.src             = "images/seminars.gif";
   seminarsdown             = new Image();
   seminarsdown.src         = "images/seminars_over.gif";

   clarea              = new Image();
   clarea.src           = "images/clarea.gif";
   clareadown           = new Image();
   clareadown.src       = "images/clarea_over.gif";
   
   search_              = new Image();
   search_.src           = "images/search.gif";
   search_down           = new Image();
   search_down.src       = "images/search_over.gif";

}

function buttondown(bname)
{
    if (document.images)
        document[bname].src = eval(bname + "down.src");
}

function buttonup(bname)
{
    if (document.images)
        document[bname].src = eval(bname + ".src");
}