function preloadImgs() {
	image1 = new Image();
	image1.src = "images/Nav_Acceuil.gif";
	image2 = new Image();
	image2.src = "images/Nav_Hebergement.gif";
	image3 = new Image();
	image3.src = "images/Nav_Activites.gif";
	image4 = new Image();
	image4.src = "images/Nav_Tarifs.gif";
	image5 = new Image();
	image5.src = "images/Nav_Acceuil_Focus.gif";
	image6 = new Image();
	image6.src = "images/Nav_Hebergement_Focus.gif";
	image7 = new Image();
	image7.src = "images/Nav_Activites_Focus.gif";
	image8 = new Image();
	image8.src = "images/Nav_Tarifs_Focus.gif";
}