ImOkon=new Image;
ImOkoff=new Image;
ImOkon.src="images/bt_ok_on.jpg";
ImOkoff.src="images/bt_ok.jpg";
ImValideon=new Image;
ImValideoff=new Image;
ImValideon.src="images/bt_valide_on.jpg";
ImValideoff.src="images/bt_valide.jpg";
ImContinuon=new Image;
ImContinuoff=new Image;
ImContinuon.src="images/bt_continuez_on.jpg";
ImContinuoff.src="images/bt_continuez.jpg";

function echange(avant, apres){
	avant.src = apres.src;
}
function echangeInput(avant,apres){
	document.getElementById(avant).src=apres.src;
}