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

function manageElement(el)
{
   for(i=0; i<document.getElementsByName("Subnavi").length; i++) 
   {
			document.getElementsByName("Subnavi")[i].style.height = "0px";   
      document.getElementsByName("Subnavi")[i].style.visibility = "hidden";
   }

   if(el!=1000)
   {
			document.getElementsByName("Subnavi")[el-1].style.height = "auto";      
      document.getElementsByName("Subnavi")[el-1].style.visibility = "visible";
   }
}