i1 = new Image();
i1.src = "images/pictos/conditionnement_over.png";
i2 = new Image();
i2.src = "images/pictos/contact_over.png";
i3 = new Image();
i3.src = "images/pictos/cueillette_over.png";
i4 = new Image();
i4.src = "images/pictos/culture_over.png";
i5 = new Image();
i5.src = "images/pictos/entreprise_over.png";