if (document.images)
{	var yellowpages = new Image();
	yellowpages.src = "yellowpages1.gif";
	var yellowpages_a = new Image();
	yellowpages_a.src = "yellowpages2.gif";
}

function inact(imgName)
{   if (document.images)
	document[imgName].src = eval(imgName + '.src');
}

function act(imgName)
{   if (document.images)
	document[imgName].src = eval(imgName + '_a.src');
}