if (document.images)
{
   home_on = new Image(); home_on.src="images/menu/home_on.gif";
   home_off = new Image(); home_off.src="images/menu/home.gif";


   industry_on = new Image(); industry_on.src="images/menu/industry_on.gif";
   industry_off = new Image(); industry_off.src="images/menu/industry.gif";

   media_on = new Image(); media_on.src="images/menu/media_on.gif";
   media_off = new Image(); media_off.src="images/menu/media.gif";

   production_on = new Image(); production_on.src="images/menu/production_on.gif";
   production_off = new Image(); production_off.src="images/menu/production.gif";

   music_on = new Image(); music_on.src="images/menu/music_on.gif";
   music_off = new Image(); music_off.src="images/menu/music.gif";

   search_on = new Image(); search_on.src="images/menu/search_on.gif";
   search_off = new Image(); search_off.src="images/menu/search.gif";
}

//===========================================================================//

function on(i) {
  if (document.images)
    document.images[i].src = eval(i + "_on.src");
}

//===========================================================================//

function off(i) {
  if (document.images)
    document.images[i].src = eval(i + "_off.src");
}