function show(elt) {
  obj = document.getElementById(elt);
  obj.style.visibility = "visible";
}

function hide(elt) {
  obj = document.getElementById(elt);
  obj.style.visibility = "hidden";
}


function seConnecter() {
	show('cadre-login');
	document.getElementById('bt-login').focus();
	return false;
}