function trim(string)
{
    return string.replace(/(^\s*)|(\s*$)/g,'');
}

function valider(form)
{

    if (trim(form.user.value) == '' )
    {
        alert("N'oubliez pas de mettre votre pseudo");
        form.user.focus();
        return false;
    }

    if (trim(form.password.value) == '' )
    {
        alert("Veuillez inscrire un mot de passe");
        form.password.focus();
        return false;
    }
    var formconnexion = document.getElementById("formconnexion");
    var user = document.getElementById("user").value;
    user = user.toLowerCase();
    user = 'http://'+user+'.todolisto.com/functions/actions.php';
    formconnexion.action = user;
    return true;
}