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) {
		all_home_over = newImage("../images/all_home-over.gif");
		all_events_over = newImage("../images/all_events-over.gif");
		all_press_over = newImage("../images/all_press-over.gif");
		all_leaflets_over = newImage("../images/all_leaflets-over.gif");
		all_articles_over = newImage("../images/all_articles-over.gif");
		all_news_over = newImage("../images/all_news-over.gif");
		all_campaign_over = newImage("../images/all_campaign-over.gif");
		all_magazine_over = newImage("../images/all_magazine-over.gif");
		
		all_feedback_over = newImage("../images/all_feedback-over.gif");
		
		all_book_over = newImage("../images/all_book-over.gif");
		all_multimedia_over = newImage("../images/all_multimedia-over.gif");
		all_gallery_over = newImage("../images/all_gallery-over.gif");
		all_circleinfo_over = newImage("../images/all_circleinfo-over.gif");
		all_htahrir_over = newImage("../images/all_htahrir-over.gif");
		all_media_over = newImage("../images/all_media-over.gif");
		all_contact_over = newImage("../images/all_contact-over.gif");
		preloadFlag = true;
	}
}