var preloadFlag = false;

function preloadImages() {
	if (document.images) {
		
		cdReleaseImgOn = newImage('images/nav2/cdReleaseOn.gif');
		cdReleaseImgOff = newImage('images/nav2/cdReleaseOff.gif');
		
		bioImgOn = newImage('images/nav2/bioOn.gif');
		bioImgOff = newImage('images/nav2/bioOff.gif');
		
		tunesImgOn = newImage('images/nav2/tunesOn.gif');
		tunesImgOff = newImage('images/nav2/tunesOff.gif');
		
		contactImgOn = newImage('images/nav2/contactOn.gif');
		contactImgOff = newImage('images/nav2/contactOff.gif');
		
		preloadFlag = true;
	}
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function turnOn (anImage) {
	if (document.images && preloadFlag == true) {
		document.images[anImage].src = eval(anImage + 'On').src;
	}
}

function turnOff (anImage) {
	if (document.images && preloadFlag == true) {
		document.images[anImage].src = eval(anImage + 'Off').src;
	}
}