function onerror() {
    document.location.href = "javascript:";
}

function init() {
	preload('butt01','images/attempt01_10.gif');
	preload('butt02','images/attempt01_11.gif');
	preload('butt03','images/attempt01_12.gif');
	preload('butt04','images/attempt01_13.gif');
	preload('butt05','images/attempt01_14.gif');

	preload('roll01','images/battempt01_10.gif');
	preload('roll02','images/battempt01_11.gif');
	preload('roll03','images/battempt01_12.gif');
	preload('roll04','images/battempt01_13.gif');
	preload('roll05','images/battempt01_14.gif');
}

function changeImg(layer,imgName,imgObj) {
	if (document.layers && layer!=null) {
		eval('document.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src');
	} else {
		document.images[imgName].src = eval(imgObj+".src");
	}
}

function preload(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj+' = new Image()');
		eval(imgObj+'.src = "'+imgSrc+'"');
	}
}