function imgOn(obj, imgName) {
	if (imgName == "avance") {
		obj.src = "../../images/gabarit/bouton_avancer_over.jpg";
	} else {
		obj.src = "../../images/gabarit/bouton_reculer_over.jpg";
	}
}

function imgOff(obj, imgName) { 
	if (imgName == "avance") {
		obj.src = "../../images/gabarit/bouton_avancer.jpg";
	} else {
		obj.src = "../../images/gabarit/bouton_reculer.jpg";
	}

}