function zeigmal(was1,was2,wie) {
 if(document.getElementById) {
     if (wie=="zeigen"){
	     document.getElementById('beispiel').style.visibility = "hidden";
	     document.getElementById('untertitel').style.visibility = "hidden";
		 document.getElementById('head_home').style.visibility = "hidden";
	     document.getElementById('home').style.visibility = "hidden";
		 
	     document.getElementById('head_theu').style.visibility = "hidden";
	     document.getElementById('theu').style.visibility = "hidden";
		 document.getElementById('head_joerss').style.visibility = "hidden";
	     document.getElementById('joerss').style.visibility = "hidden";
		 document.getElementById('head_at').style.visibility = "hidden";
	     document.getElementById('at').style.visibility = "hidden";	
	     document.getElementById('head_hart').style.visibility = "hidden";
	     document.getElementById('hart').style.visibility = "hidden";
	     document.getElementById('head_garbe').style.visibility = "hidden";
	     document.getElementById('garbe').style.visibility = "hidden";
		 document.getElementById('head_hgevent').style.visibility = "hidden";
	     document.getElementById('hgevent').style.visibility = "hidden";
		 document.getElementById('head_fried').style.visibility = "hidden";
	     document.getElementById('fried').style.visibility = "hidden"; 
		 
 		  document.getElementById('head_elf').style.visibility = "hidden";
	     document.getElementById('elf').style.visibility = "hidden";
		 document.getElementById('head_zuse').style.visibility = "hidden";
	     document.getElementById('zuse').style.visibility = "hidden";
		
		 document.getElementById('head_hin').style.visibility = "hidden";
	     document.getElementById('hin').style.visibility = "hidden";
		 document.getElementById('head_lang').style.visibility = "hidden";
	     document.getElementById('lang').style.visibility = "hidden";
		 
		
		
		 	 		 
         document.getElementById(was1).style.visibility = "visible";		 	 		 		 		 		 		 		 		 		 		 		 		 
         document.getElementById(was2).style.visibility = "visible";
		 }
	 else
	     document.getElementById(was).style.visibility = "hidden";
   }
}