var oldMenu='';
var oldTemp='';
var oldSub='';

// Openen en sluiten van submenu's 
function toggleFolder(strTemp,keusadres){
   strMenu = 'Menu' + strTemp;

if ((oldTemp != '') && (oldTemp != strTemp))
 { 
   oldMenu = 'Menu' + oldTemp;
     eval(oldMenu + '.style.display = "none"');
  } ;

   if (eval(strMenu + '.style.display') == 'none')
     {eval(strMenu + '.style.display = ""');}
     else
     {eval(strMenu + '.style.display = "none"');}

     oldTemp=strTemp;
     menukeus('hier',keusadres);
  };

// Openen en sluiten van sub-submenu's 
function toggleSub(strSub,keusadres){
   strSubMenu = 'Menu' + strSub;

if ((oldSub != '') && (oldSub != strSub))
 { 
   oldMenu = 'Menu' + oldSub;
     eval(oldMenu + '.style.display = "none"');
  } ;

   if (eval(strSubMenu + '.style.display') == 'none')
     {eval(strSubMenu + '.style.display = ""');}
     else
     {eval(strSubMenu + '.style.display = "none"');}

     oldSub=strSub;
     menukeus('hier',keusadres);
  };

// Ahandelen van muisbeweging op menu-opties 
function mouse_moved()
 {
  el      = event.srcElement ;
  el_styl = el.getAttribute("className") ;
  status  = el_styl.substring(5,8) ; 
  object  = el_styl.substring(0,5) ; 
   if ((status == "off") || (status == "act"))
    { nw_styl = object + 'on';
     }
   else
    {nw_styl = object + 'off';
     }

   if ((el.getAttribute("litUp") != null) && (status != "act"))
   {
    el.className = nw_styl;
   }
 };

// Afhandelen van gekozen menu-optie
// 'Itemplek' bepaaLt of al dan niet een nieuw venster wordt geopend.
function menukeus(keusplek,keusadres)
 {
  ItemPlek=keusplek;

if (ItemPlek != 'hier')
  {
   parent.onder.mainscrn.location.href='leeg.html';
   WebWindow=window.open
         (keusadres,NewItem,"toolbar=yes,scrollbars=yes");
  }
else
  {
   doel='parent.mainscrn.location.href=\''+keusadres+ '\';';
   eval(doel);
  }
 };

// Afhandelen van gekozen LINK
function linkkeus(keusadres)
 {
   WebWindow=window.open
         (keusadres,'NewItem',"toolbar=yes,scrollbars=yes");
 };

document.onmouseover = mouse_moved ;
document.onmouseout = mouse_moved ;