function AfficherContact()
{
	wContact=window.open('contacts.html', 'Contacts', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=505,height=350');
	wContact.focus();
}
		
function Entrer()
{
	window.location='presentation.html';
}