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_button_over = newImage("images/home_button_over.gif");
		profile_button_over = newImage("images/profile_button_over.gif");
		services_button_over = newImage("images/services_button_over.gif");
		portfolio_button_over = newImage("images/portfolio_button_over.gif");
		testimonials_button_over = newImage("images/testimonials_button_over.gif");
		contact_us_button_over = newImage("images/contact_us_button_over.gif");
		log_in_button_over = newImage("images/log_in_button_over.gif");
		promotions_button_over = newImage("images/promotions_button_over.gif");

		policy_terms_conditions_button_over = newImage("images/policy_terms_conditions_button_over.gif");
		
		preloadFlag = true;
	}
}