function displaySubmenu (submenu) {
	hideSubmenus();
	document.getElementById(submenu).style.display="block";
}

function hideSubmenus () {
	document.getElementById('submenu_centreHospitalier').style.display="none";
	document.getElementById('submenu_soins').style.display="none";
	document.getElementById('submenu_enseignementEtRecherche').style.display="none";
}