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) {
		presentation_img_over = newImage("images/presentation_img-over.jpg");
		news_img_over = newImage("images/news_img-over.jpg");
		contacts_img_over = newImage("images/contacts_img-over.jpg");
		projets_img_over = newImage("images/projets_img-over.jpg");
		realisations_img_over = newImage("images/realisations_img-over.jpg");
		preloadFlag = true;
	}
}

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) {
		menu_accueil_img_over = newImage("images/menu/menu_accueil_img-over.jpg");
		menu_presentation_img_over = newImage("images/menu/menu_presentation_img-over.jpg");
		menu_news_img_over = newImage("images/menu/menu_news_img-over.jpg");
		menu_projets_img_over = newImage("images/menu/menu_projets_img-over.jpg");
		menu_realisations_img_over = newImage("images/menu/menu_realisations_img-over.jpg");
		menu_contacts_img_over = newImage("images/menu/menu_contacts_img-over.jpg");
		preloadFlag = true;
	}
}