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) {
		home_over = newImage("/images/tn-home-over.gif")
		about_us_over = newImage("/images/tn-about_us-over.gif");
		our_services_over = newImage("/images/tn-our_services-over.gif");
		our_clinic_over = newImage("/images/tn-our_clinic-over.gif");
		chiropractic_over = newImage("/images/tn-chiropractic-over.gif");
		q_a_over = newImage("/images/tn-q_a-over.gif");
		new_patients_over = newImage("/images/tn-new_patients-over.gif");
		contact_us_over = newImage("/images/tn-contact_us-over.gif");
		preloadFlag = true;
	}
}