function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images) {
		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) {
		Agence_over = newImage("images/MenuHaut/Agence1Over.gif");
		Service_over = newImage("images/MenuHaut/Service1Over.gif");
		Rea_over = newImage("images/MenuHaut/Realisation1Over.gif");
		Actu_over = newImage("images/MenuHaut/Actu1Over.gif");
		ServiceOver = newImage("images/Realisations/Menu/BtServiceOver.png");
		EleganceOver = newImage("images/Realisations/Menu/BtEleganceOver.png");
		EntrepriseOver = newImage("images/Realisations/Menu/BtEntrepriseOver.png");
		CommerceOver = newImage("images/Realisations/Menu/BtCommerceOver.png");
		InstituOver = newImage("images/Realisations/Menu/BtInstituOver.png");
		FermerOver = newImage("images/FermerOver.png");
		preloadFlag = true;
	}
}