function KlappBereich(Id){ 
 var KlaTex = document.getElementById('Layer'+Id); 
 var KlaBld = document.getElementById('Picture'+Id); 
 if (KlaTex.style.display == 'none')     {
  
    KlaTex.style.display = 'block';KlaBld.src = 'images/verstecken.gif'; 
    
    } 
 else     { 
    KlaTex.style.display = 'none'; KlaBld.src = "images/anzeigen.gif"; 
    }
}