var preloadFlag = false;

function preloadImages() {
	if (document.images) {
		
			homeImgOn = newImage('/images/nav/on/home.gif');
			homeImgOff = newImage('/images/nav/off/home.gif');
			coachesImgOn = newImage('/images/nav/on/coaches.gif');
			coachesImgOff = newImage('/images/nav/off/coaches.gif');
			networkImgOn = newImage('/images/nav/on/network.gif');
			networkImgOff = newImage('/images/nav/off/network.gif');
			newsImgOn = newImage('/images/nav/on/news.gif');
			newsImgOff = newImage('/images/nav/off/news.gif');
			contactImgOn = newImage('/images/nav/on/contact.gif');
			contactImgOff = newImage('/images/nav/off/contact.gif');
			resourcesImgOn = newImage('/images/nav/on/resources.gif');
			resourcesImgOff = newImage('/images/nav/off/resources.gif');
		
		preloadFlag = true;
	}
}

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

function swapImages (anImage, theNewImage) {
	if (document.images && preloadFlag == true) {
		document.images[anImage].src = eval(theNewImage).src;
	}
}

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;
	}
}