//Funktionen für Prisma

function navOpen(thisId,position){

   document.getElementById('navLevel1Layer_'+thisId).style.display= 'block';
   document.getElementById('s_'+position).src = document.getElementById('s_'+position).src.replace('.gif','_right_over.gif');
   var posLeft = position-1;
   document.getElementById('s_'+posLeft).src = document.getElementById('s_'+posLeft).src.replace('.gif','_left_over.gif');
   document.getElementById('navLevel_'+thisId).className = document.getElementById('navLevel_'+thisId).className.replace('navLevel1','navLevel1_over');  

}

function navClose(thisId,position){
   document.getElementById('navLevel1Layer_'+thisId).style.display= 'none';
   document.getElementById('s_'+position).src = document.getElementById('s_'+position).src.replace('_right_over.gif','.gif');
   var posLeft = position-1;
   document.getElementById('s_'+posLeft).src = document.getElementById('s_'+posLeft).src.replace('_left_over.gif','.gif');
   document.getElementById('navLevel_'+thisId).className = document.getElementById('navLevel_'+thisId).className.replace('_over','');  
}


/****** Funktionen für Navigationspunkte ohen Kindpunkte *******/

function navOver(thisId,position){
   document.getElementById('s_'+position).src = document.getElementById('s_'+position).src.replace('.gif','_right_over_null.gif');
   var posLeft = position-1;
   document.getElementById('s_'+posLeft).src = document.getElementById('s_'+posLeft).src.replace('.gif','_left_over_null.gif');
}

function navOut(thisId,position){
   document.getElementById('s_'+position).src = document.getElementById('s_'+position).src.replace('_right_over_null.gif','.gif');
   var posLeft = position-1;
   document.getElementById('s_'+posLeft).src = document.getElementById('s_'+posLeft).src.replace('_left_over_null.gif','.gif');
}