function zeigen(wert) {

if(document.layers){
document.layers[wert].visibility='show';
}
else if(document.all){
document.all[wert].style.visibility='visible';
}
else if(document.getElementById){
document.getElementById(wert).style.visibility='visible';
}
}

	function verstecken(a,b,c,d,e) {
	  if(document.layers) { 
	  document.layers[a].visibility='hide';
	  document.layers[b].visibility='hide';
	  document.layers[c].visibility='hide';
	  document.layers[d].visibility='hide';
	  document.layers[e].visibility='hide';
	}
	  else if(document.all){ 
	  document.all[a].style.visibility='hidden';
	  document.all[b].style.visibility='hidden';
	  document.all[c].style.visibility='hidden';
	  document.all[d].style.visibility='hidden';
	  document.all[e].style.visibility='hidden';
	  }
	  else if(document.getElementById){ 
	  document.getElementById(a).style.visibility='hidden';
	  document.getElementById(b).style.visibility='hidden';
	  document.getElementById(c).style.visibility='hidden';
	  document.getElementById(d).style.visibility='hidden';
	  document.getElementById(e).style.visibility='hidden';
	  }
	}