function roll(btn_name, turnon)
{
	handle = document.getElementsByName(btn_name);
	if(turnon)
	{
		handle[0].src = "http://www.wplinkdir.com/images/nav/" + btn_name + "_on.png";
	}
	else
	{
		handle[0].src = "http://www.wplinkdir.com/images/nav/" + btn_name + ".png";
	}
}