function preloadImages() {
	if (document.images) {
		var imgFiles = preloadImages.arguments;
		var preloadArray = new Array();
		
		for (var i=0; i < imgFiles.length; i++) {
			preloadArray[i] = new Image;
			preloadArray[i].src = imgFiles[i];
		}
	}
}

function swap(id, newsrc) {
	var theImage = locateImage(id);
	if (theImage) {
		theImage.src = newsrc;
	}
}

function locateImage(name) {
	var theImage = false;
	if (document.images) {
		theImage = document.images[name];
	}
	if (theImage) {
		return theImage;
	}
	return false;
}