title: ReferenceError: MediabrowserUtility is not defined in magento wysiwyg
body: <p>my question that i am using wysiwyg editor in magento admin side i checked every page every thing is right no error in code when click on the insert image they generate the error and can not works fine so help me anyone they face this type of error.  error is
  "ReferenceError: MediabrowserUtility is not defined"
  thanks</p>
  
  <pre><code>  $wysiwygConfig = Mage::getSingleton('cms/wysiwyg_config')-&gt;getConfig(array('tab_id' =&gt; 'form_section'));
    $wysiwygConfig["files_browser_window_url"] = Mage::getSingleton('adminhtml/url')-&gt;getUrl('adminhtml/cms_wysiwyg_images/index');
    $wysiwygConfig["directives_url"] = Mage::getSingleton('adminhtml/url')-&gt;getUrl('adminhtml/cms_wysiwyg/directive');
    $wysiwygConfig["directives_url_quoted"] = Mage::getSingleton('adminhtml/url')-&gt;getUrl('adminhtml/cms_wysiwyg/directive');
    $wysiwygConfig["widget_window_url"] = Mage::getSingleton('adminhtml/url')-&gt;getUrl('adminhtml/widget/index');
    $wysiwygConfig["files_browser_window_width"] = (int) Mage::getConfig()-&gt;getNode('adminhtml/cms/browser/window_width');
    $wysiwygConfig["files_browser_window_height"] = (int) Mage::getConfig()-&gt;getNode('adminhtml/cms/browser/window_height');
    $plugins = $wysiwygConfig-&gt;getData("plugins");
    $plugins[0]["options"]["url"] = Mage::getSingleton('adminhtml/url')-&gt;getUrl('adminhtml/system_variable/wysiwygPlugin');
    $plugins[0]["options"]["onclick"]["subject"] = "MagentovariablePlugin.loadChooser('".Mage::getSingleton('adminhtml/url')-&gt;getUrl('adminhtml/system_variable/wysiwygPlugin')."', '{{html_id}}');";
    $plugins = $wysiwygConfig-&gt;setData("plugins",$plugins);
  
      $fieldset-&gt;addField('question_details', 'editor', array(
        'name'      =&gt; 'content',
        'label'     =&gt; Mage::helper('supportportal')-&gt;__('Details'),
        'title'     =&gt; Mage::helper('supportportal')-&gt;__('Details'),
        'style'     =&gt; 'width:600px; height:300px;',
        'config'    =&gt; $wysiwygConfig,
        'wysiwyg'   =&gt; true,
        'required'  =&gt; true,
    ));
  </code></pre>