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) {
		btProperty_over = newImage("/images/btProperty-over.gif");
		btLocations_over = newImage("/images/btLocations-over.gif");
		btAmenities_over = newImage("/images/btAmenities-over.gif");
		btViews_over = newImage("/images/btViews-over.gif");
		btContact_over = newImage("/images/btContact-over.gif");
		btTenantServices_over = newImage("/images/btTenantServices-over.gif");
		preloadFlag = true;
	}
}