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)
	{
		a02_over = newImage("_images/02-over.gif");
		a03_over = newImage("_images/03-over.gif");
		a04_over = newImage("_images/04-over.gif");
		a05_over = newImage("_images/05-over.gif");
		a06_over = newImage("_images/06-over.gif");
		a07_over = newImage("_images/07-over.gif");
		a08_over = newImage("_images/08-over.gif");
		a09_over = newImage("_images/09-over.gif");
		
		preloadFlag = true;
	}
}