function highlight(imgName) 
	{
		if (document.images && imgName != selectedTab) {
			document.images[imgName].src = 'images/' + tabPrefix + imgName + '_lit.gif';
		}
	}
	
function clickIt(imgName) 
	{
		if (document.images)
			{
				document.images[imgName].src = 'images/' + tabPrefix + imgName + '_sel.gif'
				oldSelected = selectedTab;
				selectedTab = imgName;
				if (oldSelected != "-none-") { unlight(oldSelected) }
			}
	}
	
function unlight(imgName) 
	{
		if (document.images && imgName != selectedTab)
		document.images[imgName].src = 'images/' + tabPrefix + imgName + '.gif';
	}