if (document.images)
{
	teston = new Image(); // Active images
	teston.src = "test.on.gif";

	testoff = new Image(); // Inactive images
	testoff.src = "test.off.gif";
}

function imgOn(imgName)
{

	if (document.images)
	{
		document[imgName].src = "/images/" + imgName + "_Over.gif";
	}
}

function imgOff(imgName)
{

	if (document.images)
	{
		document[imgName].src = "/images/" + imgName + ".gif";
	}
}