if (document.images != null)
{ 
home_on  = new Image; home_on.src = "uploads/images/webdesign/b_home_h.gif";
home_off = new Image; home_off.src = "uploads/images/webdesign/b_home.gif";
aktuelles_on  = new Image; aktuelles_on.src = "uploads/images/webdesign/b_aktuelles_h.gif";
aktuelles_off = new Image; aktuelles_off.src = "uploads/images/webdesign/b_aktuelles.gif";
anfahrt_on  = new Image; anfahrt_on.src = "uploads/images/webdesign/b_anfahrt_h.gif";
anfahrt_off = new Image; anfahrt_off.src = "uploads/images/webdesign/b_anfahrt.gif";
aufstiege_on  = new Image; aufstiege_on.src = "uploads/images/webdesign/b_aufstiege_h.gif";
aufstiege_off = new Image; aufstiege_off.src = "uploads/images/webdesign/b_aufstiege.gif";
touren_on  = new Image; touren_on.src = "uploads/images/webdesign/b_touren_h.gif";
touren_off = new Image; touren_off.src = "uploads/images/webdesign/b_touren.gif";
preise_on  = new Image; preise_on.src = "uploads/images/webdesign/b_preise_h.gif";
preise_off = new Image; preise_off.src = "uploads/images/webdesign/b_preise.gif";
fotos_on  = new Image; fotos_on.src = "uploads/images/webdesign/b_fotos_h.gif";
fotos_off = new Image; fotos_off.src = "uploads/images/webdesign/b_fotos.gif";
team_on  = new Image; team_on.src = "uploads/images/webdesign/b_team_h.gif";
team_off = new Image; team_off.src = "uploads/images/webdesign/b_team.gif";
kontakt_on  = new Image; kontakt_on.src = "uploads/images/webdesign/b_kontakt_h.gif";
kontakt_off = new Image; kontakt_off.src = "uploads/images/webdesign/b_kontakt.gif";
impressum_on  = new Image; impressum_on.src = "uploads/images/webdesign/b_impressum_h.gif";
impressum_off = new Image; impressum_off.src = "uploads/images/webdesign/b_impressum.gif";
}  

function img_act(imgName) { 
	if (document.images != null) { 
		imgOn = eval(imgName + "_on.src");
		document [imgName].src = imgOn;
   }
}

function img_inact(imgName) { 
	if (document.images != null) { 
			imgOff = eval(imgName + "_off.src");
			document [imgName].src = imgOff;	
  }
}

function highlight(button_off_name,seitenname) {
	button_off_name.src = "uploads/images/webdesign/b_" + seitenname + "_h.gif";
}