// preload images

if (document.images) 
	
	{
	var onea = new Image();
	onea.src = "images/register.gif";
	var oneb = new Image();
	oneb.src = "images/register_roll.gif";
	}
	
// activate images

function act(imgName,imgStatic) 
	{
	if (document.images) 
		document[imgName].src = eval(imgName + "b.src");
	}

// deactivate images

function inact(imgName,imgStatic) 
	{
	if (document.images)
		document[imgName].src = eval(imgName + "a.src");
	}