var preloaded = false;

function preload() {
	this.length = preload.arguments.length;
	for (var i = 0; i < this.length; i++) {
		this[i+1] = new Image();
		this[i+1].src = preload.arguments[i];
	}
}

function preloadImages() {
	if (document.images) {
		var highlights1 = new preload("/images/nav_gallery.gif",
			"/images/nav_gallery_hi.gif",
			"/images/nav_contact.gif",
			"/images/nav_contact_hi.gif");
		preloaded = true;
	}
}

function swapImage(imageName, imageLocation) {
	if (preloaded) {
		imageName.src = imageLocation;
	}
}