function newImage(arg) {
   if (document.images) {
      rslt = new Image();
      rslt.src = arg;
      return rslt;
   }
}
function changeImagesArray(array) {
   if (preloadFlag == true) {
      var d = document; var img;
      for (var i=0; i<array.length; i+=2) {
         img = null; var n = array[i];
         if (d.images) {img = d.images[n];}
         if (!img && d.getElementById) {img = d.getElementById(n);}
         if (img) {img.src = array[i+1];}
      }
   }
}
function changeImages() {
   changeImagesArray(changeImages.arguments);
}

var preloadFlag = false;
function preloadImages() {
   if (document.images) {
      pre_menu_01_ = newImage('../shared/images/menu_01_.gif');
      pre_menu_02_ = newImage('../shared/images/menu_02_.gif');
      pre_menu_03_ = newImage('../shared/images/menu_03_.gif');
      pre_menu_04_ = newImage('../shared/images/menu_04_.gif');
      pre_menu_05_ = newImage('../shared/images/menu_05_.gif');
      pre_menu_06_ = newImage('../shared/images/menu_06_.gif');
      pre_menu_07_ = newImage('../shared/images/menu_07_.gif');
      pre_menu_08_ = newImage('../shared/images/menu_08_.gif');
      pre_nl_ = newImage('../shared/images/nl_.gif');
      pre_uk_ = newImage('../shared/images/uk_.gif');
      pre_fr_ = newImage('../shared/images/fr_.gif');
      pre_connexx_ = newImage('../shared/connexx_.gif');
      preloadFlag = true;
   }
}

function ShowSubmenu(grp_id){
  child = document.getElementById("sub" + grp_id);
  if (child != null){
    if (child.style.display == "none")
      child.style.display = "block";
    else
      child.style.display = "none";
  }
}