var ie4 = (document.all) ? true : false;
var ns4 = (document.layers) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;

function hidelayer(lay) {
  if (layeravail(lay)) {
    if (ie4) {document.all[lay].style.visibility = "hidden";}
    if (ns4) {document.layers[lay].visibility = "hide";}
    if (ns6) {document.getElementById([lay]).style.display = "none";}
  }
}

function layeravail(lay) {
  var retval=false;
  if (ie4) { retval=true; } //{ if (document.all[lay]) { retvalue=true; } }
  if (ns4) { retval=true; } //{ if (document.layers[lay]) { retvalue=true; } }
  if (ns6) { retval=true; } //{ if (document.getElementById([lay])) { retvalue=true; } }
  return retval;
}

function menuOpen(mID) {
  menuHideLayers();
  showlayer(mID);
  //menuTimeoutLayer(mID);
}


function hideMenus() {
  if (timer==1) {
    if (counter>=10) { closeMenus(); counter=0; } else { counter++; }
  }
}

function closeMenus() {
  //hidelayer('menu_news');
}

function showMenu(lay) {
  closeMenus();
  if (layeravail(lay)) {
    if (ie4) {document.all[lay].style.visibility = "visible"; }
    if (ns4) {document.layers[lay].visibility = "show"; }
    if (ns6) {document.getElementById([lay]).style.visibility = "visible"; document.getElementById([lay]).style.display = "block"; }
  }
  counter=0;
}

function keepMenu() {
  counter=0;
}

function stopTimer() {
  counter=0; timer=0;
}

function startTimer() {
  counter=0; timer=1;
}

counter=0; timer=1;
tID=setInterval('hideMenus()',100);