diff --git a/admin/bloque_salle.php b/admin/bloque_salle.php
index af5a22c..abcc2f1 100644
--- a/admin/bloque_salle.php
+++ b/admin/bloque_salle.php
@@ -1,26 +1,35 @@
 <?php
+include_once('libhome.php');
 include_once('winlog_admin_conf.php');
 include_once('client_http.php');
 
+$username = phpCAS::getUser();
+$admin = false;                                     // booleen : utilisateur administrateur ?
+if (in_array($username, $administrateurs)) {
+    $admin = true;
+}
+
 Function bascule_salle($url) {
-	GetURL($url);
+    GetURL($url);
 }
 
-$action = $_GET["a"];
-$salle  = $_GET["s"];
-$url = "";
-$param = "?s=$salle"; 
-if ($action === "b") { 
-	$url = $url_bloque . $param;
-}
-if ($action === "d") { 
-	$url = $url_debloque . $param;
-}
+if ($admin) {
 
-if ($action != "" ) { 
-	bascule_salle($url); 
-}
+    $action = $_GET["a"];
+    $salle  = $_GET["s"];
+    $url = "";
+    $param = "?s=$salle"; 
+    if ($action === "b") { 
+    	$url = $url_bloque . $param;
+    }
+    if ($action === "d") { 
+    	$url = $url_debloque . $param;
+    }
 
+    if ($action != "" ) { 
+    	bascule_salle($url); 
+    }
+}
 $precedent = $_SERVER["HTTP_REFERER"];
 header("Location: $precedent");
 ?>