function newImage(arg) 
{	if (document.images)
	{	rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages()
{	if (document.images && (preloadFlag == true))
	{	for (var i=0; i<changeImages.arguments.length; i+=2)
		{	document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages()
{	if (document.images)
	{	hmover = newImage("images/hmover.gif");
		artover = newImage("images/artover.gif");
		nwsover = newImage("images/nwsover.gif");
		archover = newImage("images/archover.gif");
		agndover = newImage("images/agndover.gif");
		infover = newImage("images/infover.gif");
		lnkover = newImage("images/lnkover.gif");
		preloadFlag = true;
	}
}