function expandOrRetract(expandableElementId, expanderElementId, hideAlt, showAlt)
{
	if (document.getElementById(expandableElementId).style.display == 'none')
	{
		document.getElementById(expandableElementId).style.display = 'block';
		document.getElementById(expanderElementId).src = '/images/retract.gif';
		document.getElementById(expanderElementId).alt = hideAlt;
	}
	else
	{
		document.getElementById(expandableElementId).style.display = 'none';
		document.getElementById(expanderElementId).src = '/images/expand.gif';
		document.getElementById(expanderElementId).alt = showAlt;
	}
}