function $(objID)
{
  return document.getElementById(objID);
}

function Offset(e)
{
  var t = e.offsetTop;
  var l = e.offsetLeft;
  var w = e.offsetWidth;
  var h = e.offsetHeight-2;

  while(e=e.offsetParent)
  {
    t+=e.offsetTop;
    l+=e.offsetLeft;
  }
  return {
    top : t,
    left : l,
    width : w,
    height : h
  }
}

function ChildList(parentID,objID)
{
	var parent = $(parentID);	
	var childList = $(objID);
	var offset = Offset(parent);
    childList.style.position = "absolute";
	childList.style.top=offset.top+21 + "px"; 
	childList.style.left=offset.left + "px"; 
 
	if(childList.style.display=="none")
	{
		childList.style.display="";
	}
	else if(childList.style.display=="")
	{
		childList.style.display="none";
	}
}

function hiddenChildList(objID)
{
	var childList = $(objID);	
	childList.style.display="none";
}