//function showhide(id)
//{
//	layer = "layer" + id;
//	layerElement = document.getElementById(layer);
//	if (layerElement)
//	{
//		if (layerElement.className == 'showlayer')
//		{
//			layerElement.className = "hidelayer";
//		}
//		else
//		{
//			layerElement.className = "showlayer";
//		}
//	}
//}

function showhide(intTurnOn)
{ 
	// turn all tabs off (except active)
	for (intCurrent = 1; intCurrent <= intTotalTabs; intCurrent++)
	{
		var strTabName = 'layer' + intCurrent;
		var layerelement = document.getElementById(strTabName);
		if (layerelement)
		{
			if (intTurnOn == intCurrent)
			{
				layerelement.className = 'showlayer';
			}
			else
			{
				layerelement.className = 'hidelayer';
			}
		}
	}
}