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) {
		gamedrives_over = newImage("images/gamedrives-over.gif");
		gamewalks_over = newImage("images/gamewalks-over.gif");
		thehides_over = newImage("images/thehides-over.gif");
		sleepout_over = newImage("images/sleepout-over.gif");
		thegym_over = newImage("images/thegym-over.gif");
		bushspa_over = newImage("images/bushspa-over.gif");
		bushbbq_over = newImage("images/bushbbq-over.gif");
		specialisedact_over = newImage("images/specialisedact-over.gif");
		preloadFlag = true;
	}
}