Fixed calendar using backwards compatibility hack in global scope

calendar.js

@@ -1,6 +1,9 @@
-document.body.className += ' yui-skin-sam';
+YUI().use('yui2-container', 'yui2-calendar', function(Y) {
+    var YAHOO = Y.YUI2;
 
-YAHOO.util.Event.onDOMReady(function(){
+    document.body.className += ' yui-skin-sam';
+
+    YAHOO.util.Event.onDOMReady(function(){
 
         var Event = YAHOO.util.Event,
             Dom = YAHOO.util.Dom,
@@ -93,4 +96,6 @@ YAHOO.util.Event.onDOMReady(function(){
 
             dialog.show();
         });
+    });
 });
+

renderer.php

@@ -106,8 +106,6 @@ class mod_attforblock_renderer extends plugin_renderer_base {
                     'cal_cur_date'  => $fcontrols->curdate);
             $curdate_controls = html_writer::script(js_writer::set_variable('M.attforblock', $jsvals));
 
-            //$this->page->requires->yui2_lib('container');
-            //$this->page->requires->yui2_lib('calendar');
             $this->page->requires->js('/mod/attforblock/calendar.js');
 
             $curdate_controls .= html_writer::link($fcontrols->url(array('curdate' => $fcontrols->prevcur)), $this->output->larrow());