var suppbyid = (document.getElementById) ? 1 : 0
var suppall = (document.all) ? 1 : 0;
var supp = suppbyid + suppall;

img0 = new Image();
img0.src = "0.gif";
img1 = new Image();
img1.src = "bg2.gif";
img2 = new Image();
img2.src = "bg3.gif";
img3 = new Image();
img3.src = "bg4.gif";
img4 = new Image();
img4.src = "bg5.gif";
img5 = new Image();
img5.src = "hr1.gif";
img6 = new Image();
img6.src = "hr2.gif";
img7 = new Image();
img7.src = "hr3.gif";
img8 = new Image();
img8.src = "hr4.gif";
img9 = new Image();
img9.src = "sub_bg.gif";
img10 = new Image();
img10.src = "sub_bg2.gif";

imga1 = new Image();
imga1.src = "m_kezdolap.gif";
imga2 = new Image();
imga2.src = "m_kezdolap_aktiv.gif";

imgb1 = new Image();
imgb1.src = "m_sinndar.gif";
imgb2 = new Image();
imgb2.src = "m_sinndar_aktiv.gif";

imgc1 = new Image();
imgc1.src = "m_referenciak.gif";
imgc2 = new Image();
imgc2.src = "m_referenciak_aktiv.gif";

imgd1 = new Image();
imgd1.src = "m_partnereink.gif";
imgd2 = new Image();
imgd2.src = "m_partnereink_aktiv.gif";

imge1 = new Image();
imge1.src = "m_elerhetosegunk.gif";
imge2 = new Image();
imge2.src = "m_elerhetosegunk_aktiv.gif";

imgf1 = new Image();
imgf1.src = "m_sitemap.gif";
imgf2 = new Image();
imgf2.src = "m_sitemap_aktiv.gif";

var tim = null;

function GetElement(obj_name) {
  if (suppbyid) return document.getElementById(obj_name);
  if (suppall) return document.all(obj_name);
  return NULL;
}

function SetImage(image_doc, image_mem) {
  if (!supp) return;

  obj = GetElement(image_doc);

  if (obj) {
    obj.src = eval(image_mem + ".src");
  }
}

function DoHide() {
  if (!supp) return;

  SetImage('imgb', 'imgb1');

  obj = GetElement("submenu");
  obj.style.visibility = "hidden";
}

function HideSubMenu() {
  if (!supp) return;

  clearTimeout(tim);
  tim = setTimeout("DoHide()", 50);
}

function ShowSubMenu() {
  if (!supp) return;

  clearTimeout(tim);

  SetImage('imgb', 'imgb2');

  obj = GetElement("submenu");
  obj.style.visibility = "visible";
}