// the "x" code was scarfed from the "X" library; see cross-browser.com

function xGetElementById(e) {
  if(typeof(e)!="string") return e;
  return document.getElementById(e);
}

// jeffrey added:
function xCollapse(e) {
	if(!(e=xGetElementById(e))) return;
	e.style.display = "none";
}
function xExpand(e)	{
	if(!(e=xGetElementById(e))) return;
	e.style.display = "block";
}