var aNormal, aFocus;
var bLoaded = false;
var currNb = -1;
function preloadImages(currPage)
{
	currNb = currPage;
	if (! document.images)
		return;

	aNormal = new Array(5);
	aFocus = new Array(5);
	for (i = 0; i < 5; i ++)
	{
		aNormal[i] = new Image(44, 45);
		aNormal[i].src = "images/" + i + "2.jpg";
		aFocus[i] = new Image(44, 45);
		aFocus[i].src = "images/" + i + "2f.jpg";
	}
	bLoaded = true;
}

function chgImg(imgNb, on)
{
	if (document.images && bLoaded && (imgNb != currNb))
		document.images["img" + imgNb].src = (on ? aFocus : aNormal)[imgNb].src;
	
	return true;
}