function roll(node,status)
{	nodeImg = node.firstChild
	srcImage = nodeImg.getAttribute("src")
	
	if (status)
	{	navState = srcImage.substring(srcImage.length - 7,srcImage.length - 4)
		if (navState != "sel")
		{	srcImage = srcImage.substring(0,srcImage.length - 7)
			srcImage = srcImage + "on.gif"
			nodeImg.setAttribute("src",srcImage)
		}
	}
	else
	{	navState = srcImage.substring(srcImage.length - 7,srcImage.length - 4)
		if (navState != "sel")
		{	srcImage = srcImage.substring(0,srcImage.length - 6)
			srcImage = srcImage + "off.gif"
			nodeImg.setAttribute("src",srcImage)
		}
	}
}

function swapPic(which)
{	full = document.getElementById("bigPic").childNodes[0]
	
	source = full.getAttribute("src")
	source = source.replace(/_\d+\./, '_' + which + '.')
	
	full.setAttribute("src",source)
}