var nava 		= (document.layers);
var dom 		= (document.getElementById);
var iex 		= (document.all);

function get(itemID)
{
	if (nava) 		{ var item = document.itemID }
	else if (dom) { var item = document.getElementById(itemID) }
	else if (iex) { var item = document.all(itemID) }

	if(item != "undefined")
		return item;
	else
		return false;
}

function containsDOM (container, containee)
{
  var isParent = false;
  do
	{
    if ((isParent = container == containee))
      break;
    containee = containee.parentNode;
  }
  while (containee != null);
  return isParent;
}

function checkMouseLeave (element, evt)
{
	evt = (evt) ? evt : ((window.event) ? event : null);
  if (element.contains && evt.toElement)
	{
    return !element.contains(evt.toElement);
  }
  else if (evt.relatedTarget) {
    return !containsDOM(element, evt.relatedTarget);
  }
}