diff --git a/course/delete_category_form.php b/course/delete_category_form.php
index 48b0f44ca77..8e63d9f18da 100644
--- a/course/delete_category_form.php
+++ b/course/delete_category_form.php
@@ -110,11 +110,14 @@ class delete_category_form extends moodleform {
             }
         } else {
             $mform->addElement('hidden', 'fulldelete', 1);
+            $mform->setType('fulldelete', PARAM_INT);
             $mform->addElement('static', 'emptymessage', '', get_string('deletecategoryempty'));
         }
 
         $mform->addElement('hidden', 'delete');
+        $mform->setType('delete', PARAM_ALPHANUM);
         $mform->addElement('hidden', 'sure');
+        $mform->setType('sure', PARAM_ALPHANUM);
         $mform->setDefault('sure', md5(serialize($category)));
 
 //--------------------------------------------------------------------------------
diff --git a/course/edit_form.php b/course/edit_form.php
index 86d67e319f8..e5bc904dbcd 100644
--- a/course/edit_form.php
+++ b/course/edit_form.php
@@ -65,6 +65,7 @@ class course_edit_form extends moodleform {
             $mform->addElement('select', 'category', get_string('category'), $displaylist);
         } else {
             $mform->addElement('hidden', 'category', null);
+            $mform->setType('category', PARAM_INT);
         }
         $mform->setHelpButton('category', array('coursecategory', get_string('category')));
         $mform->setDefault('category', $category->id);
@@ -378,6 +379,7 @@ class course_edit_form extends moodleform {
             $mform->disabledIf('allowedmods', 'restrictmodules', 'eq', 0);
         } else {
             $mform->addElement('hidden', 'restrictmodules', null);
+            $mform->setType('restrictmodules', PARAM_INT);
         }
         if ($CFG->restrictmodulesfor == 'all') {
             $mform->setDefault('allowedmods', explode(',',$CFG->defaultallowedmodules));
@@ -412,9 +414,13 @@ class course_edit_form extends moodleform {
 
         // fill in default teacher and student names to keep backwards compatibility for a while
         $mform->addElement('hidden', 'teacher', get_string('defaultcourseteacher'));
+        $mform->setType('teacher', PARAM_RAW);
         $mform->addElement('hidden', 'teachers', get_string('defaultcourseteachers'));
+        $mform->setType('teachers', PARAM_RAW);
         $mform->addElement('hidden', 'student', get_string('defaultcoursestudent'));
+        $mform->setType('student', PARAM_RAW);
         $mform->addElement('hidden', 'students', get_string('defaultcoursestudents'));
+        $mform->setType('students', PARAM_RAW);
     }
 
     function definition_after_data() {
diff --git a/course/recent_form.php b/course/recent_form.php
index dde3dbe45c8..05ce8433a21 100644
--- a/course/recent_form.php
+++ b/course/recent_form.php
@@ -99,6 +99,7 @@ class recent_form extends moodleform {
             }
         } else {
             $mform->addElement('hidden','group');
+            $mform->setType('group', PARAM_INT);
             $mform->setConstants(array('group'=>0));
         }
 
@@ -111,6 +112,7 @@ class recent_form extends moodleform {
         $mform->addElement('date_time_selector', 'date', get_string('since'), array('optional'=>true));
 
         $mform->addElement('hidden','id');
+        $mform->setType('id', PARAM_INT);
         $mform->setType('courseid', PARAM_INT);
 
         $this->add_action_buttons(false, get_string('showrecent'));
diff --git a/course/request_form.php b/course/request_form.php
index 89a73e97c71..98a74ef27a8 100644
--- a/course/request_form.php
+++ b/course/request_form.php
@@ -128,6 +128,7 @@ class reject_request_form extends moodleform {
         $mform =& $this->_form;
 
         $mform->addElement('hidden', 'reject', 0);
+        $mform->setType('reject', PARAM_INT);
 
         $mform->addElement('header','coursedetails', get_string('coursereasonforrejecting'));
 
diff --git a/course/reset_form.php b/course/reset_form.php
index 96bddad93e0..ce0fe4c0822 100644
--- a/course/reset_form.php
+++ b/course/reset_form.php
@@ -80,6 +80,7 @@ class course_reset_form extends moodleform {
         }
 
         $mform->addElement('hidden', 'id', $COURSE->id);
+        $mform->setType('id', PARAM_INT);
 
         $buttonarray = array();
         $buttonarray[] = &$mform->createElement('submit', 'submitbutton', get_string('resetcourse'));
diff --git a/grade/edit/outcome/import_outcomes_form.php b/grade/edit/outcome/import_outcomes_form.php
index e819b7fdb7d..d447e013866 100644
--- a/grade/edit/outcome/import_outcomes_form.php
+++ b/grade/edit/outcome/import_outcomes_form.php
@@ -27,7 +27,9 @@ class import_outcomes_form extends moodleform {
         //$this->set_upload_manager(new upload_manager('importfile', false, false, null, false, 0, true, true, false));
 
         $mform->addElement('hidden', 'action', 'upload');
+        $mform->setType('action', PARAM_ACTION);
         $mform->addElement('hidden', 'id', $COURSE->id);
+        $mform->setType('id', PARAM_INT);
 
         $scope = array();
         if (($COURSE->id > 1) && has_capability('moodle/grade:manage', get_context_instance(CONTEXT_SYSTEM))) {
diff --git a/grade/edit/tree/grade_form.php b/grade/edit/tree/grade_form.php
index 52b32b194b6..b794d40c1ad 100755
--- a/grade/edit/tree/grade_form.php
+++ b/grade/edit/tree/grade_form.php
@@ -106,7 +106,9 @@ class edit_grade_form extends moodleform {
 
         // hidden params
         $mform->addElement('hidden', 'oldgrade');
+        $mform->setType('oldgrade', PARAM_RAW);
         $mform->addElement('hidden', 'oldfeedback');
+        $mform->setType('oldfeedback', PARAM_RAW);
 
         $mform->addElement('hidden', 'id', 0);
         $mform->setType('id', PARAM_INT);
diff --git a/grade/export/grade_export_form.php b/grade/export/grade_export_form.php
index c0dffe3ffab..84a65064398 100755
--- a/grade/export/grade_export_form.php
+++ b/grade/export/grade_export_form.php
@@ -126,6 +126,7 @@ class grade_export_form extends moodleform {
         }
 
         $mform->addElement('hidden', 'id', $COURSE->id);
+        $mform->setType('id', PARAM_INT);
         $this->add_action_buttons(false, get_string('submit'));
 
     }
diff --git a/grade/import/xml/grade_import_form.php b/grade/import/xml/grade_import_form.php
index d8a2a219c89..e24105d9713 100644
--- a/grade/import/xml/grade_import_form.php
+++ b/grade/import/xml/grade_import_form.php
@@ -28,6 +28,7 @@ class grade_import_form extends moodleform {
         // course id needs to be passed for auth purposes
         $mform->addElement('hidden', 'id', optional_param('id'));
         $mform->setType('id', PARAM_INT);
+
         $mform->addElement('header', 'general', get_string('importfile', 'grades'));
         $mform->disabledIf('url', 'userfile', 'noteq', '');
 
diff --git a/lib/formslib.php b/lib/formslib.php
index f1bf8772c2f..2af556db195 100644
--- a/lib/formslib.php
+++ b/lib/formslib.php
@@ -116,8 +116,10 @@ class moodleform {
         $this->definition();
 
         $this->_form->addElement('hidden', 'sesskey', null); // automatic sesskey protection
+        $this->_form->setType('sesskey', PARAM_RAW);
         $this->_form->setDefault('sesskey', sesskey());
         $this->_form->addElement('hidden', '_qf__'.$this->_formname, null);   // form submission marker
+        $this->_form->setType('_qf__'.$this->_formname, PARAM_RAW);
         $this->_form->setDefault('_qf__'.$this->_formname, 1);
         $this->_form->_setDefaultRuleMessages();
 
@@ -572,6 +574,7 @@ class moodleform {
         $mform =& $this->_form;
         $mform->registerNoSubmitButton($addfieldsname);
         $mform->addElement('hidden', $repeathiddenname, $repeats);
+        $mform->setType($repeathiddenname, PARAM_INT);
         //value not to be overridden by submitted value
         $mform->setConstants(array($repeathiddenname=>$repeats));
         $namecloned = array();
@@ -668,6 +671,7 @@ class moodleform {
         }
 
         $mform->addElement('hidden', "checkbox_controller$groupid");
+        $mform->setType("checkbox_controller$groupid", PARAM_INT);
         $mform->setConstants(array("checkbox_controller$groupid" => $new_select_value));
 
         // Locate all checkboxes for this group and set their value, IF the optional param was given
@@ -863,6 +867,7 @@ class MoodleQuickForm extends HTML_QuickForm_DHTMLRulesTableless {
             $this->registerNoSubmitButton('mform_showadvanced');
 
             $this->addElement('hidden', 'mform_showadvanced_last');
+            $this->setType('mform_showadvanced_last', PARAM_INT);
         }
     }
     /**
diff --git a/mod/forum/post_form.php b/mod/forum/post_form.php
index 02b3cc53965..44cdb38fd01 100644
--- a/mod/forum/post_form.php
+++ b/mod/forum/post_form.php
@@ -39,6 +39,7 @@ class mod_forum_post_form extends moodleform {
 
             $mform->addElement('static', 'subscribemessage', get_string('subscription', 'forum'), get_string('everyoneissubscribed', 'forum'));
             $mform->addElement('hidden', 'subscribe');
+            $mform->setType('subscribe', PARAM_INT);
             $mform->setHelpButton('subscribemessage', array('subscription', get_string('subscription', 'forum'), 'forum'));
 
         } else if (isset($forum->forcesubscribe)&& $forum->forcesubscribe != FORUM_DISALLOWSUBSCRIBE ||
@@ -53,6 +54,7 @@ class mod_forum_post_form extends moodleform {
         } else if ($forum->forcesubscribe == FORUM_DISALLOWSUBSCRIBE) {
             $mform->addElement('static', 'subscribemessage', get_string('subscription', 'forum'), get_string('disallowsubscribe', 'forum'));
             $mform->addElement('hidden', 'subscribe');
+            $mform->setType('subscribe', PARAM_INT);
             $mform->setHelpButton('subscribemessage', array('subscription', get_string('subscription', 'forum'), 'forum'));
         }
 
diff --git a/mod/glossary/edit_form.php b/mod/glossary/edit_form.php
index b9f357eaeee..f4e72f0a159 100644
--- a/mod/glossary/edit_form.php
+++ b/mod/glossary/edit_form.php
@@ -64,8 +64,11 @@ class mod_glossary_entry_form extends moodleform {
         }
         if ( !$glossary->usedynalink ) {
             $mform->addElement('hidden', 'usedynalink', $usedynalink);
+            $mform->setType('usedynalink', PARAM_INT);
             $mform->addElement('hidden', 'casesensitive', $casesensitive);
+            $mform->setType('casesensitive', PARAM_INT);
             $mform->addElement('hidden', 'fullmatch', $fullmatch);
+            $mform->setType('fullmatch', PARAM_INT);
         } else {
 //-------------------------------------------------------------------------------
             $mform->addElement('header', 'linkinghdr', get_string('linking', 'glossary'));
@@ -86,9 +89,13 @@ class mod_glossary_entry_form extends moodleform {
         }
 
         $mform->addElement('hidden', 'e', $e);
+        $mform->setType('e', PARAM_INT);
         $mform->addElement('hidden', 'id', $cm->id);
+        $mform->setType('id', PARAM_INT);
         $mform->addElement('hidden', 'mode', $mode);
+        $mform->setType('mode', PARAM_ALPHA);
         $mform->addElement('hidden', 'hook', $hook);
+        $mform->setType('hook', PARAM_ALPHANUM);
 
 //-------------------------------------------------------------------------------
         $this->add_action_buttons();
diff --git a/mod/glossary/mod_form.php b/mod/glossary/mod_form.php
index d1048dfa399..d5096c4910b 100644
--- a/mod/glossary/mod_form.php
+++ b/mod/glossary/mod_form.php
@@ -35,6 +35,7 @@ class mod_glossary_mod_form extends moodleform_mod {
 
         }else{
             $mform->addElement('hidden', 'globalglossary');
+            $mform->setType('globalglossary', PARAM_INT);
         }
 
         $options = array(1=>get_string('mainglossary', 'glossary'), 0=>get_string('secondaryglossary', 'glossary'));
diff --git a/mod/hotpot/mod_form.php b/mod/hotpot/mod_form.php
index 5186f3cdb5c..aba497441f2 100644
--- a/mod/hotpot/mod_form.php
+++ b/mod/hotpot/mod_form.php
@@ -55,6 +55,7 @@ class mod_hotpot_mod_form extends moodleform_mod {
         } else {
             // existing HotPot
             $mform->addElement('hidden', 'namesource', HOTPOT_TEXTSOURCE_SPECIFIC);
+            $mform->setType('namesource', PARAM_RAW);
             $mform->addElement('text', 'name', get_string('name'), array('size' => '40'));
         }
         $mform->setType('namesource', PARAM_INT);
@@ -81,6 +82,7 @@ class mod_hotpot_mod_form extends moodleform_mod {
         }
         if (array_key_exists($location, $HOTPOT_LOCATION)) {
             $mform->addElement('hidden', 'location', $location);
+            $mform->setType('location', PARAM_RAW);
         } else { // admin can select from "site" or "course" files
            $mform->addElement('select', 'location', get_string('location', 'hotpot'), $HOTPOT_LOCATION);
         }
@@ -120,6 +122,7 @@ class mod_hotpot_mod_form extends moodleform_mod {
         } else {
             // existing HotPot
             $mform->addElement('hidden', 'summarysource', HOTPOT_TEXTSOURCE_SPECIFIC);
+            $mform->setType('summarysource', PARAM_RAW);
             $mform->addElement('htmleditor', 'summary', get_string('summary'));
             $mform->setType('summary', PARAM_RAW);
             $mform->setHelpButton('summary', array('writing', 'questions', 'richtext'), false, 'editorhelpbutton');
@@ -245,6 +248,7 @@ class mod_hotpot_mod_form extends moodleform_mod {
 // Remove grade item
         if (empty($this->_instance) || ! record_exists('grade_items', 'itemtype', 'mod', 'itemmodule', 'hotpot', 'iteminstance', $this->_instance)) {
             $mform->addElement('hidden', 'removegradeitem', 0);
+            $mform->setType('removegradeitem', PARAM_INT);
         } else {
             $mform->addElement('selectyesno', 'removegradeitem', get_string('removegradeitem', 'hotpot'));
             $mform->setHelpButton('removegradeitem', array('removegradeitem', get_string('removegradeitem', 'hotpot'), 'hotpot'));
diff --git a/mod/quiz/mod_form.php b/mod/quiz/mod_form.php
index c5b01c161bb..a5d8971dbe1 100644
--- a/mod/quiz/mod_form.php
+++ b/mod/quiz/mod_form.php
@@ -222,6 +222,7 @@ class mod_quiz_mod_form extends moodleform_mod {
         $mform->setHelpButton('overallfeedbackhdr', array('overallfeedback', get_string('overallfeedback', 'quiz'), 'quiz'));
 
         $mform->addElement('hidden', 'grade', $CFG->quiz_maximumgrade);
+        $mform->setType('grade', PARAM_RAW);
         if (empty($this->_cm)) {
             $needwarning = $CFG->quiz_maximumgrade == 0;
         } else {
diff --git a/mod/resource/mod_form.php b/mod/resource/mod_form.php
index e6a800022e0..cde9a0f6a40 100644
--- a/mod/resource/mod_form.php
+++ b/mod/resource/mod_form.php
@@ -19,6 +19,7 @@ class mod_resource_mod_form extends moodleform_mod {
             $type = required_param('type', PARAM_ALPHA);
         }
         $mform->addElement('hidden', 'type', $type);
+        $mform->setType('type', PARAM_ALPHA);
         $mform->setDefault('type', $type);
 
         require($CFG->dirroot.'/mod/resource/type/'.$type.'/resource.class.php');
diff --git a/mod/scorm/mod_form.php b/mod/scorm/mod_form.php
index fa0ea8be181..88394441182 100644
--- a/mod/scorm/mod_form.php
+++ b/mod/scorm/mod_form.php
@@ -155,10 +155,15 @@ class mod_scorm_mod_form extends moodleform_mod {
 //-------------------------------------------------------------------------------
 // Hidden Settings
         $mform->addElement('hidden', 'datadir', null);
+        $mform->setType('datadir', PARAM_RAW);
         $mform->addElement('hidden', 'pkgtype', null);
+        $mform->setType('pkgtype', PARAM_RAW);
         $mform->addElement('hidden', 'launch', null);
+        $mform->setType('launch', PARAM_RAW);
         $mform->addElement('hidden', 'redirect', null);
+        $mform->setType('redirect', PARAM_RAW);
         $mform->addElement('hidden', 'redirecturl', null);
+        $mform->setType('redirecturl', PARAM_RAW);
 
 
 //-------------------------------------------------------------------------------
diff --git a/question/move_form.php b/question/move_form.php
index 331a509ff74..01a0870a1a8 100644
--- a/question/move_form.php
+++ b/question/move_form.php
@@ -18,6 +18,7 @@ class question_move_form extends moodleform {
         $this->add_action_buttons(true, get_string('categorymoveto', 'quiz'));
 //--------------------------------------------------------------------------------
         $mform->addElement('hidden', 'delete', $currentcat);
+        $mform->setType('delete', PARAM_INT);
     }
 }
 ?>
diff --git a/question/type/calculated/edit_calculated_form.php b/question/type/calculated/edit_calculated_form.php
index b3422b41aed..a8cb8332df1 100644
--- a/question/type/calculated/edit_calculated_form.php
+++ b/question/type/calculated/edit_calculated_form.php
@@ -51,6 +51,7 @@ class question_edit_calculated_form extends question_edit_form {
         $this->qtypeobj =& $QTYPES[$this->qtype()];
         $label = get_string("sharedwildcards", "qtype_datasetdependent");
         $mform->addElement('hidden', 'initialcategory', 1);
+        $mform->setType('initialcategory', PARAM_INT);
         $html2 = $this->qtypeobj->print_dataset_definitions_category($this->question);
         $mform->insertElementBefore($mform->createElement('static','listcategory',$label,$html2),'name');
         $addfieldsname='updatecategory';
diff --git a/question/type/datasetdependent/datasetitems_form.php b/question/type/datasetdependent/datasetitems_form.php
index 48460928052..aafc08b1396 100644
--- a/question/type/datasetdependent/datasetitems_form.php
+++ b/question/type/datasetdependent/datasetitems_form.php
@@ -84,7 +84,9 @@ class question_dataset_dependent_items_form extends moodleform {
             $this->qtypeobj->custom_generator_tools_part(&$mform, $idx, $j);
             $idx++;
             $mform->addElement('hidden', "definition[$j]");
+            $mform->setType("definition[$j]", PARAM_RAW);
             $mform->addElement('hidden', "itemid[$j]");
+            $mform->setType("itemid[$j]", PARAM_RAW);
             $mform->addElement('static', "divider[$j]", '', '<hr />');
             $j++;
         }
diff --git a/question/type/description/edit_description_form.php b/question/type/description/edit_description_form.php
index 6771eb5a964..184ff5cb287 100644
--- a/question/type/description/edit_description_form.php
+++ b/question/type/description/edit_description_form.php
@@ -24,6 +24,7 @@ class question_edit_description_form extends question_edit_form {
         $mform->removeElement('penalty');
 
         $mform->addElement('hidden', 'defaultgrade', 0);
+        $mform->setType('defaultgrade', PARAM_RAW);
     }
 
     function qtype() {
diff --git a/question/type/essay/edit_essay_form.php b/question/type/essay/edit_essay_form.php
index b207c2e1007..9efd100cc32 100644
--- a/question/type/essay/edit_essay_form.php
+++ b/question/type/essay/edit_essay_form.php
@@ -24,10 +24,12 @@ class question_edit_essay_form extends question_edit_form {
         $mform->setType('feedback', PARAM_RAW);
 
         $mform->addElement('hidden', 'fraction', 0);
+        $mform->setType('fraction', PARAM_RAW);
 
         //don't need this default element.
         $mform->removeElement('penalty');
         $mform->addElement('hidden', 'penalty', 0);
+        $mform->setType('penalty', PARAM_RAW);
     }
 
     function set_data($question) {
diff --git a/question/type/randomsamatch/edit_randomsamatch_form.php b/question/type/randomsamatch/edit_randomsamatch_form.php
index 63c1c617739..1dfd51697c3 100644
--- a/question/type/randomsamatch/edit_randomsamatch_form.php
+++ b/question/type/randomsamatch/edit_randomsamatch_form.php
@@ -30,6 +30,7 @@ class question_edit_randomsamatch_form extends question_edit_form {
         $mform->setType('feedback', PARAM_RAW);
 
         $mform->addElement('hidden', 'fraction', 0);
+        $mform->setType('fraction', PARAM_RAW);
     }
 
     function set_data($question) {
diff --git a/tag/edit_form.php b/tag/edit_form.php
index fbfdf067b89..5aaec36198e 100644
--- a/tag/edit_form.php
+++ b/tag/edit_form.php
@@ -11,6 +11,7 @@ class tag_edit_form extends moodleform {
         $mform->addElement('header', 'tag', get_string('description','tag'));
 
         $mform->addElement('hidden', 'id');
+        $mform->setType('id', PARAM_INT);
 
         $systemcontext   = get_context_instance(CONTEXT_SYSTEM);
 
diff --git a/user/edit_form.php b/user/edit_form.php
index 390a1c05e5e..805772b8705 100644
--- a/user/edit_form.php
+++ b/user/edit_form.php
@@ -16,7 +16,9 @@ class user_edit_form extends moodleform {
 
         /// Add some extra hidden fields
         $mform->addElement('hidden', 'id');
+        $mform->setType('id', PARAM_INT);
         $mform->addElement('hidden', 'course', $COURSE->id);
+        $mform->setType('course', PARAM_INT);
 
         /// Print the required moodle fields first
         $mform->addElement('header', 'moodle', $strgeneral);
diff --git a/user/editadvanced_form.php b/user/editadvanced_form.php
index 054d3959a61..99b0d300e55 100644
--- a/user/editadvanced_form.php
+++ b/user/editadvanced_form.php
@@ -16,7 +16,9 @@ class user_editadvanced_form extends moodleform {
 
         /// Add some extra hidden fields
         $mform->addElement('hidden', 'id');
+        $mform->setType('id', PARAM_INT);
         $mform->addElement('hidden', 'course', $COURSE->id);
+        $mform->setType('course', PARAM_INT);
 
         /// Print the required moodle fields first
         $mform->addElement('header', 'moodle', $strgeneral);
diff --git a/user/filters/user_filter_forms.php b/user/filters/user_filter_forms.php
index d1bbccdc17f..9cd507970e8 100644
--- a/user/filters/user_filter_forms.php
+++ b/user/filters/user_filter_forms.php
@@ -19,6 +19,7 @@ class user_add_filter_form extends moodleform {
         if ($extraparams) {
             foreach ($extraparams as $key=>$value) {
                 $mform->addElement('hidden', $key, $value);
+                $mform->setType($key, PARAM_RAW);
             }
         }
 
@@ -57,6 +58,7 @@ class user_active_filter_form extends moodleform {
             if ($extraparams) {
                 foreach ($extraparams as $key=>$value) {
                     $mform->addElement('hidden', $key, $value);
+                    $mform->setType($key, PARAM_RAW);
                 }
             }
 
diff --git a/user/profile/index_category_form.php b/user/profile/index_category_form.php
index 51c585ccf38..991d4529d79 100644
--- a/user/profile/index_category_form.php
+++ b/user/profile/index_category_form.php
@@ -14,7 +14,9 @@ class category_form extends moodleform {
 
         /// Add some extra hidden fields
         $mform->addElement('hidden', 'id');
+        $mform->setType('id', PARAM_INT);
         $mform->addElement('hidden', 'action', 'editcategory');
+        $mform->setType('iction', PARAM_ACTION);
 
         $mform->addElement('text', 'name', get_string('profilecategoryname', 'admin'), 'maxlength="255" size="30"');
         $mform->setType('name', PARAM_MULTILANG);
diff --git a/user/profile/index_field_form.php b/user/profile/index_field_form.php
index 781c7afaa45..e61848a09e6 100644
--- a/user/profile/index_field_form.php
+++ b/user/profile/index_field_form.php
@@ -22,8 +22,11 @@ class field_form extends moodleform {
 
         /// Add some extra hidden fields
         $mform->addElement('hidden', 'id');
+        $mform->setType('id', PARAM_INT);
         $mform->addElement('hidden', 'action', 'editfield');
+        $mform->setType('action', PARAM_ACTION);
         $mform->addElement('hidden', 'datatype', $datatype);
+        $mform->setType('datatype', PARAM_ALPHA);
 
         $this->field->define_form($mform);