i1 = new Image;
i1.src = "img/jump_lien_blog.jpg";
i2 = new Image;
i2.src = "/img/sit_lien_site.jpg";
function afficheSaut(){
	var imgBanniere = document.getElementById('banniere');
	imgBanniere.src = "/img/jump_lien_blog.jpg";
}
function afficheGrenouille(){
	var imgBanniere = document.getElementById('banniere');
	imgBanniere.src = "/img/sit_lien_site.jpg";
}
function afficheVide(){
	var imgBanniere = document.getElementById('banniere');
	imgBanniere.src = "/img/bienvenue_vide.jpg";
}