// create image objects
home						= new Image();
home_over					= new Image();
home_act					= new Image();
produkte       				= new Image();
produkte_over	      		= new Image();
produkte_act				= new Image();
produkte_en    				= new Image();
produkte_over_en      		= new Image();
produkte_act_en				= new Image();
firma						= new Image();
firma_over					= new Image();
firma_act					= new Image();
phil	       				= new Image();
phil_over	      			= new Image();
phil_act	      			= new Image();
upgrade						= new Image();
upgrade_over				= new Image();
upgrade_act					= new Image();
galerie	       				= new Image();
galerie_over	      		= new Image();
galerie_act		      		= new Image();
service						= new Image();
service_over				= new Image();
service_act					= new Image();
downloads					= new Image();
downloads_over				= new Image();
downloads_act				= new Image();
gestaltung					= new Image();
gestaltung_over				= new Image();
gestaltung_act				= new Image();
kontakt       				= new Image();
kontakt_over 	     		= new Image();
kontakt_act 	     		= new Image();
alpha						= new Image();
alpha_over					= new Image();
beta						= new Image();
beta_over					= new Image();
gamma						= new Image();
gamma_over					= new Image();
bass						= new Image();
bass_over					= new Image();
bass4						= new Image();
bass4_over					= new Image();
affa1						= new Image();
affa1_over					= new Image();

// preload images
home.src				= "images/menu_home.png";
home_over.src			= "images/menu_home_over.png";
home_act.src			= "images/menu_home_act.png";
produkte.src			= "images/menu_produkte.png";
produkte_over.src		= "images/menu_produkte_over.png";
produkte_act.src		= "images/menu_produkte_act.png";
produkte_en.src			= "images/menu_produkte_en.png";
produkte_over_en.src	= "images/menu_produkte_over_en.png";
produkte_act_en.src		= "images/menu_produkte_act_en.png";
firma.src				= "images/menu_firma.png";
firma_over.src			= "images/menu_firma_over.png";
firma_act.src			= "images/menu_firma_act.png";
phil.src				= "images/menu_phil.png";
phil_over.src			= "images/menu_phil_over.png";
phil_act.src			= "images/menu_phil_act.png";
upgrade.src				= "images/menu_upgrade.png";
upgrade_over.src		= "images/menu_upgrade_over.png";
upgrade_act.src			= "images/menu_upgrade_act.png";
galerie.src				= "images/menu_galerie.png";
galerie_over.src		= "images/menu_galerie_over.png";
galerie_act.src			= "images/menu_galerie_act.png";
service.src				= "images/menu_service.png";
service_over.src		= "images/menu_service_over.png";
service_act.src			= "images/menu_service_act.png";
downloads.src			= "images/menu_downloads.png";
downloads_over.src		= "images/menu_downloads_over.png";
downloads_act.src		= "images/menu_downloads_act.png";
gestaltung.src			= "images/menu_gestaltung.png";
gestaltung_over.src		= "images/menu_gestaltung_over.png";
gestaltung_act.src		= "images/menu_gestaltung_act.png";
kontakt.src				= "images/menu_kontakt.png";
kontakt_over.src		= "images/menu_kontakt_over.png";
kontakt_act.src			= "images/menu_kontakt_act.png";
alpha.src				= "images/alpha_pic.png";
alpha_over.src			= "images/alpha_pic_act.png";
beta.src				= "images/beta_pic.png";
beta_over.src			= "images/beta_pic_act.png";
gamma.src				= "images/gamma_pic.png";
gamma_over.src			= "images/gamma_pic_act.png";
bass.src				= "images/basshorn_pic.png";
bass_over.src			= "images/basshorn_pic_act.png";
bass4.src				= "images/basshorn_p4_pic.png";
bass4_over.src			= "images/basshorn_p4_pic_act.png";
affa1.src				= "images/affa_pic.png";
affa1_over.src			= "images/affa_pic_act.png";


// image exchange function
function bildwechsel(image_name, image_var)
{
  document.images[image_name].src = image_var.src;
}