diff --git a/renderer.php b/renderer.php
index 15436d2..8d41377 100644
--- a/renderer.php
+++ b/renderer.php
@@ -68,7 +68,7 @@ class mod_attendance_renderer extends plugin_renderer_base {
         $filtertable->data[0][] = $this->render_view_controls($fcontrols);
 
         $o = html_writer::table($filtertable);
-        $o = $this->output->container($o, 'attfiltercontrols attwidth');
+        $o = $this->output->container($o, 'attfiltercontrols');
 
         return $o;
     }
diff --git a/student_attendance_form.php b/student_attendance_form.php
index 03fd77f..c8fc1ca 100644
--- a/student_attendance_form.php
+++ b/student_attendance_form.php
@@ -19,13 +19,10 @@ require_once($CFG->libdir.'/formslib.php');
 
 class mod_attendance_student_attendance_form extends moodleform {
     public function definition() {
-        global $CFG, $USER;
+        global $USER;
 
         $mform  =& $this->_form;
 
-        $course = $this->_customdata['course'];
-        $cm = $this->_customdata['cm'];
-        $modcontext = $this->_customdata['modcontext'];
         $attforsession = $this->_customdata['session'];
         $attblock = $this->_customdata['attendance'];
 
diff --git a/styles.css b/styles.css
index a4cb3dc..621f9c1 100644
--- a/styles.css
+++ b/styles.css
@@ -1,8 +1,4 @@
 .path-mod-attendance .attbtn {
-    -khtml-border-radius: 5px;
-    -moz-border-radius: 5px;
-    -opera-border-radius: 5px;
-    -webkit-border-radius: 5px;
     border:1px solid #AAAAAA;
     border-radius: 5px;
     margin-left: 2px;
@@ -17,9 +13,10 @@
 }
 
 .path-mod-attendance .attfiltercontrols {
-    margin-bottom: 10px !important;
+    margin-bottom: 10px;
     margin-left:auto;
     margin-right:auto;
+    width:90%;
 }
 
 .path-mod-attendance .attfiltercontrols #currentdate{
diff --git a/tests/attendance_webservices_test.php b/tests/attendance_webservices_test.php
index cd3c364..5191c2e 100644
--- a/tests/attendance_webservices_test.php
+++ b/tests/attendance_webservices_test.php
@@ -63,7 +63,6 @@ class attendance_webservices_tests extends advanced_testcase {
 
         $this->setUser($this->teacher);
 
-        $sessions = array();
         $session = new stdClass();
         $session->sessdate = time();
         $session->duration = 6000;
diff --git a/update_form.php b/update_form.php
index cd452c0..104c540 100644
--- a/update_form.php
+++ b/update_form.php
@@ -61,7 +61,6 @@ class mod_attendance_update_form extends moodleform {
         $endhour = floor($endtime / HOURSECS);
         $endminute = floor(($endtime - $endhour * HOURSECS) / MINSECS);
 
-        $sesendtime = $sess->sessdate + $sess->duration;
         $data = array('sessiondate' => $sess->sessdate,
                 'sestime' => array('starthour' => $starthour, 'startminute' => $startminute,
                                    'endhour' => $endhour, 'endminute' => $endminute),