function logout_usuario(){var xmlhttp=initAjax();var url='logout.php';xmlhttp.open('GET',url,true);xmlhttp.send(null);xmlhttp.onreadystatechange=function(){if(xmlhttp.readyState==4){if(xmlhttp.status==200){var login=document.getElementById('login');login.style.display='none';document.location.href='noticias_asociacion.php';}}}}