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_ysp_over = newImage("images/about_ysp-over.gif");
		up_prod_over = newImage("images/up_prod-over.gif");
		register_over = newImage("images/register-over.gif");
		past_prod_over = newImage("images/past_prod-over.gif");
		a_and_v_over = newImage("images/a_and_v-over.gif");
		news_over = newImage("images/news-over.gif");
		directors_over = newImage("images/directors-over.gif");
		press_over = newImage("images/press-over.gif");
		actors_say_over = newImage("images/actors_say-over.gif");
		contributors_over = newImage("images/contributors-over.gif");
		ysp_playhouse_over = newImage("images/ysp_playhouse-over.gif");
		ysp_store_over = newImage("images/ysp_store-over.gif");
		contact_over = newImage("images/contact-over.gif");
		home_over = newImage("images/home-over.gif");
		preloadFlag = true;
	}
}