Index: moodle/mod/lamslesson/mod_form.php
===================================================================
diff -u -r5977cea84c5550b8300ed41bf8ce6482ef7b6326 -r044bc381a9c59ee083f5271b39a36096b1f740a2
--- moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision 5977cea84c5550b8300ed41bf8ce6482ef7b6326)
+++ moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision 044bc381a9c59ee083f5271b39a36096b1f740a2)
@@ -101,20 +101,14 @@
 				js_writer::set_variable('currentsequence', $currentsequence));
 
         $authorpreviewbutton .= html_writer::script('', $CFG->wwwroot.'/mod/lamslesson/preview.js');
-	
-        $authorpreviewbutton .= html_writer::start_tag('div', array('id' => 'buttons', 'style' => 'float:right;'));
+    	$authorpreviewbutton .= html_writer::start_tag('div', array('id' => 'buttons', 'style' => 'float:right'));
+        
         // Preview button
-        $authorpreviewbutton .= html_writer::start_tag('span', array('id' => 'previewbutton', 'style' => 'visibility:hidden;', 'class' => 'yui3-button yui3-link-button'));
-        $authorpreviewbutton .= html_writer::start_tag('span', array('class' => 'first-child'));
-        $authorpreviewbutton .= html_writer::link('#nogo', $openpreviewlabel, array('onclick' => js_writer::function_call('openPreview', array('1' => $previewurl, '2' => 'preview', '3' => 0))));
-        $authorpreviewbutton .= html_writer::end_tag('span');
-        $authorpreviewbutton .= html_writer::end_tag('span');
-	//Authoring button
-        $authorpreviewbutton .= html_writer::start_tag('span', array('id' => 'authorbutton', 'class' => 'yui3-button yui3-link-button'));
-        $authorpreviewbutton .= html_writer::start_tag('span', array('class' => 'first-child'));
-        $authorpreviewbutton .= html_writer::link('#nogo', $openauthorlabel, array('onclick' => js_writer::function_call('openAuthor', array('1' => $authorurl, '2' => 'author', '3' => 0))));
-        $authorpreviewbutton .= html_writer::end_tag('span');
-        $authorpreviewbutton .= html_writer::end_tag('span');
+        $authorpreviewbutton .= html_writer::link('#nogo', $openpreviewlabel, array('onclick' => js_writer::function_call('openPreview', array('1' => $previewurl, '2' => 'preview', '3' => 1280, '4' => 720)), 'id' => 'previewbutton', 'style' => 'visibility:hidden;', 'class' => 'btn btn-primary'));
+
+        //Authoring button
+        $authorpreviewbutton .= html_writer::link('#nogo', $openauthorlabel, array('onclick' => js_writer::function_call('PopupCenter', array('1' => $authorurl, '2' => 'author', '3' => 1280, '4' => 720)), 'class' => 'btn btn-primary', 'id' => 'authorbutton'));
+
         $authorpreviewbutton .= html_writer::end_tag('div');
 	}