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

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		privatetrainingover = newImage("images/privatetraining-over.jpg");
		specialover = newImage("images/special-over.jpg");
		bookpartyover = newImage("images/bookparty-over.jpg");
		classesover = newImage("images/classes-over.jpg");
		after8over = newImage("images/after8-over.jpg");
		instructorsover = newImage("images/instructors-over.jpg");
		studiorentalover = newImage("images/studiorental-over.jpg");
		newmemberover = newImage("images/newmemberspecialover.jpg");
		preloadFlag = true;
	}
}