function absLeft(el)
{
  return (el.offsetParent) ? el.offsetLeft+absLeft(el.offsetParent) : el.offsetLeft;
}

function absTop(el)
{
  return (el.offsetParent) ? el.offsetTop+absTop(el.offsetParent) : el.offsetTop;
}

function hide(el)
{
	document.getElementById(el).style.visibility = 'hidden';
}

function show(el,parent)
{
  if(parent)
  {
    x = absLeft(parent);
    y = absTop(parent);
    w = parent.offsetWidth;
    h = parent.offsetHeight;
    document.getElementById(el).style.left  = x+'px';
    document.getElementById(el).style.top   = y+h+'px';
    document.getElementById(el).style.minwidth = w+'px';
    //alert("X="+x+" Y="+y+" W="+w+" H="+h);
  }
  document.getElementById(el).style.visibility="visible";
}