function rollover(img, onImage)
{
	if (document.images && !img.offImage)
	{
		img.offImage = new Image();
		img.offImage.src = img.src;
		img.onmouseout = rolloverOff;
		
		img.onImage = new Image();
		img.onImage.src = onImage;
		img.onmouseover = rolloverOn;
	}
}

function rolloverOff()
{
	this.src = this.offImage.src;
}

function rolloverOn()
{
	this.src = this.onImage.src;
}