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) {
		about_us2_over = newImage("images/about_us2-over.gif");
		services2_over = newImage("images/services2-over.gif");
		outpatient2_over = newImage("images/outpatient2-over.gif");
		signs_symptoms2_over = newImage("images/signs_symptoms2-over.gif");
		resources2_over = newImage("images/resources2-over.gif");
		fot2_over = newImage("images/fot2-over.gif");
		how_help2_over = newImage("images/how_help2-over.gif");
		career_opp2_over = newImage("images/career_opp2-over.gif");		
		intern2_over = newImage("images/INTERN2_TOP_OVER.jpg");
		contact_locate2_over = newImage("images/contact_locate2-over.gif");
		news_room2_over = newImage("images/medcontact2_over.gif");
		payment2_over = newImage("images/payment2-over.gif");
		preloadFlag = true;
	}
}