var Opened=0;

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

function checkMouseEnter (element, evt) {
  if (element.contains && evt.fromElement) {
    return !element.contains(evt.fromElement);
  }
  else if (evt.relatedTarget) {
    return !containsDOM(element, evt.relatedTarget);
  }
}

function checkMouseLeave (element, evt) {
  if (element.contains && evt.toElement) {
    return !element.contains(evt.toElement);
  }
  else if (evt.relatedTarget) {
    return !containsDOM(element, evt.relatedTarget);
  }
}

function Show(m)
{
	document.getElementById(m).style.visibility = 'visible';
	if (Opened!=0) document.getElementById(Opened).style.visibility = 'hidden';
	Opened=m;
	
}

function Hide(m)
{
	document.getElementById(m).style.visibility = 'hidden';
	if (Opened!=m && Opened!=0) document.getElementById(Opened).style.visibility = 'hidden';
	Opened=0;
}