btnUrl = new Array(
	'beavers.htm',
	'cubs.htm',
	'scouts.htm',
	'http://www.malloryexplorers.org.uk');
btnAlt = new Array(
	'Beaver Colony pages',
	'Cub Pack pages',
	'Scout Troop Pages',
	'Explorer Scout Unit website');
btnImg = new Array(
	'beaver',
	'cub',
	'scout',
	'explorer');
var btnWdt = 225;
var btnHgt = 100;
var numBtns = btnUrl.length;
var BtnsLoaded = false;

// load button images
function loadButtons() {
	buttonsOff = new Array();
	buttonsHover = new Array();
	for(arg=0; arg<numBtns; arg++) {
		buttonsOff['btn' + arg] = new Image();
		buttonsOff['btn' + arg].src = "media/btn_" + btnImg[arg] + "_off.png";
		imageAssign(arg,'Off');
	}
	for(arg=0; arg<numBtns; arg++) {
		buttonsHover['btn' + arg] = new Image();
		buttonsHover['btn' + arg].src = "media/btn_" + btnImg[arg] + "_hov.png";
	}
	BtnsLoaded = true;
}

// button image function
function imageAssign(objNum,objStatus) {
	document.images['btn' + objNum].src = eval('buttons' + objStatus + '.btn' + objNum + '.src');
}

// write menu option
function buildMenuOption(btnNum) {
	code = '<TR HEIGHT="' + btnHgt + '"><TD><A HREF="' + btnUrl[btnNum] + '"';
	code = code + ' ONMOUSEOVER="imageChange(\'' + btnNum + '\',\'Hover\')"';
	code = code + ' ONMOUSEOUT="imageChange(\'' + btnNum + '\',\'Off\')"';
	code = code + '><IMG NAME="btn' + btnNum + '" SRC="media/shim.gif" WIDTH="' + btnWdt + '" HEIGHT="' + btnHgt + '" BORDER=0 ALT="' + btnAlt[btnNum] + '"></A></TD></TR>';
	document.write(code);
}

// build menu option
function buildMenu() {
	for (var btn=0; btn<numBtns; btn++){
		buildMenuOption(btn);
	}
}

bVer = parseInt(navigator.appVersion);
if (bVer >= 3) br = "v3";
else br = "v2";

// mouseover button function
function imageChange(objNum,objStatus) {
	if (br == "v3" && BtnsLoaded == true) {
		imageAssign(objNum,objStatus);
	}
}