diff --git a/index.php b/index.php
index 91bdb3a..b341e97 100644
--- a/index.php
+++ b/index.php
@@ -85,12 +85,12 @@ if ($_SERVER["REQUEST_METHOD"] == "POST") {
                 <form method="post" action="">
                 <?php
                 if ($etat_volet === "none") {
-                    <input type="submit" name="ouvrir_volet"  value="oui" onclick="document.getElementById('chargement_fermeture_volet').style.display = 'block';document.getElementById('main').style.opacity = '0.5';">
-                    <input type="submit" name="fermer_volet"  value="oui" onclick="document.getElementById('chargement_ouverture_volet').style.display = 'block';document.getElementById('main').style.opacity = '0.5';">
+                    echo '<input type="submit" name="ouvrir_volet"  value="oui" onclick="document.getElementById(\'chargement_fermeture_volet\').style.display = \'block\';document.getElementById(\'main\').style.opacity = \'0.5\';">'
+                    echo '<input type="submit" name="fermer_volet"  value="oui" onclick="document.getElementById(\'chargement_ouverture_volet\').style.display = \'block\';document.getElementById(\'main\').style.opacity = \'0.5\';">'
                 } elseif ($etat_volet === "ouvert") {
-                    <input type="submit" name="fermer_volet"  value="oui" onclick="document.getElementById('chargement_ouverture_volet').style.display = 'block';document.getElementById('main').style.opacity = '0.5';">
+                    echo '<input type="submit" name="fermer_volet"  value="oui" onclick="document.getElementById(\'chargement_ouverture_volet\').style.display = \'block\';document.getElementById(\'main\').style.opacity = \'0.5\';">'
                 } elseif ($etat_volet === "fermé") {
-                    <input type="submit" name="ouvrir_volet"  value="oui" onclick="document.getElementById('chargement_fermeture_volet').style.display = 'block';document.getElementById('main').style.opacity = '0.5';">
+                    echo '<input type="submit" name="ouvrir_volet"  value="oui" onclick="document.getElementById(\'chargement_fermeture_volet\').style.display = \'block\';document.getElementById(\'main\').style.opacity = \'0.5\';">'
                 }?>
                 </form>
             </div>