function toggleImage(whichLayer, imgPath)
{
	if (document.images)
	{
		document[whichLayer].src = imgPath;
	}
}

function toggleLayerPM(whichLayer)
{
	togglePlusMinus(whichLayer);

	var elem, vis;
	elem = getLayer(whichLayer);
	vis = elem.style;

	if (vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
		vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
	vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

function toggleLayer(whichLayer)
{
	var elem, vis;
	elem = getLayer(whichLayer);
	vis = elem.style;

	if (vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
		vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
	vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

function togglePlusMinus(whichLayer)
{
	if (document.images)
	{
		var id = whichLayer + "_plus_minus";

		if (document[id].src.indexOf('/IMG/common/icons/bw_plus.gif') > -1)
			document[id].src = '/IMG/common/icons/bw_minus.gif';
		else
			document[id].src = '/IMG/common/icons/bw_plus.gif';
	}
}

function getLayer(whichLayer)
{
	var elem;
	if (document.getElementById)
		elem = document.getElementById(whichLayer);
	else if (document.all)
		elem = document.all[whichLayer];
	else if (document.layers)
		elem = document.layers[whichLayer];
	return elem;
}