it's work fine thank you....
I just replace function load_script here :
<pre>
public function load_script($fieldname)
{
$data ='';
if (qa_is_mobile_probably() == false) {
$data = 'var converter = Markdown.getSanitizingConverter();' . "\n" .
'var editor = new Markdown.Editor(converter, "-'.$fieldname.'");' . "\n" .
'editor.run();' . "\n";
}
return $data;
}
<pre>