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/home-over.jpg");
		find_over = newImage("images/find-over.jpg");
		about_over = newImage("images/about-over.jpg");
		contact_over = newImage("images/contact-over.jpg");
		service_over = newImage("images/service-over.gif");
		insurance_over = newImage("images/insurance-over.gif");
		medlink_over = newImage("images/medlink-over.gif");
		obstetric_over = newImage("images/obstetric-over.gif");
		homecare_over = newImage("images/homecare-over.gif");
		companytab_over = newImage("images/companytab-over.gif");
		paymenttab_over = newImage("images/paymenttab-over.gif");
		missiontab_over = newImage("images/missiontab-over.gif");
		stafftab_over = newImage("images/stafftab-over.gif");
		preloadFlag = true;
	}
}