nMaxItem = 4;
NameIndex = 0;
DefaultState = 1;
MouseOverState = 2;
MouseDownState = 3;
imgCounter = 0;
ImageList = new Array();
bIsSupportOK = (
	((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) ||
	((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 ))
);
function AddImageToImageList(name, Default, MouseOver, MouseDown)
{
	ImageList[imgCounter] = new Array(nMaxItem);
	ImageList[imgCounter][NameIndex] = name;
	ImageList[imgCounter][DefaultState] = new Image();
	ImageList[imgCounter][DefaultState].src = Default;
	if (MouseOver != "") {
		ImageList[imgCounter][MouseOverState] = new Image();
		ImageList[imgCounter][MouseOverState].src = MouseOver;
	}
	if (MouseDown != "") {
		ImageList[imgCounter][MouseDownState] = new Image();
		ImageList[imgCounter][MouseDownState].src = MouseDown;
	}
	imgCounter++;
}
function ReplaceImage(name, state)
{
	for (i = 0; i < imgCounter; i++) {
		if (document.images[ImageList[i][NameIndex]] != null) {
			if ((name == ImageList[i][NameIndex]) && (ImageList[i][state] != null))
				document.images[name].src = ImageList[i][state].src;
		}
	}
}
AddImageToImageList("ueng", "images/ueng.gif", "images/uengd.gif", "images/ueng.gif");
AddImageToImageList("urus", "images/urus.gif", "images/urusd.gif", "images/urus.gif");
AddImageToImageList("ub1", "images/ub1.gif", "images/ub1d.gif", "images/ub1.gif");
AddImageToImageList("ub2", "images/ub2.gif", "images/ub2d.gif", "images/ub2.gif");
AddImageToImageList("ub3", "images/ub3.gif", "images/ub3d.gif", "images/ub3.gif");
AddImageToImageList("ub4", "images/ub4.gif", "images/ub4d.gif", "images/ub4.gif");
AddImageToImageList("ub5", "images/ub5.gif", "images/ub5d.gif", "images/ub5.gif");
AddImageToImageList("ub6", "images/ub6.gif", "images/ub6d.gif", "images/ub6.gif");
AddImageToImageList("ub7", "images/ub7.gif", "images/ub7d.gif", "images/ub7.gif");
AddImageToImageList("ub8", "images/ub8.gif", "images/ub8d.gif", "images/ub8.gif");