function Activate(imgName)
{
if (document.images) 
	{
	imgOn = eval(imgName + "on.src");
	document [imgName].src = imgOn;
	}
}

function Deactivate(imgName)
{
if (document.images) 
	{
	imgOff = eval(imgName + "off.src");
	document [imgName].src = imgOff;
	}
}