//tabbed content

function clearLayers(type, start, end)
{
	for (id=start; id<=end; id++)
	{
		link = xGetElementById('tab'+type+'link'+id);
		if (link)
			link.className = '';
		layer = xGetElementById('tab'+type+'layer'+id);
		layer.style.display = 'none';
	}
} //function clearLayers

function changeTab(type, id)
{
	if (id!=activeTabs[type]) {
		link = xGetElementById('tab'+type+'link'+id);
		if (link)
			link.className = 'tabactive';
		oldlink = xGetElementById('tab'+type+'link'+activeTabs[type]);
		if (oldlink)
			oldlink.className = '';
		layer = xGetElementById('tab'+type+'layer'+id);
		layer.style.display = 'block';
		oldLayer = xGetElementById('tab'+type+'layer'+activeTabs[type]);
		oldLayer.style.display = 'none';
	}
	activeTabs[type] = id;
} //function changeTab