how to invoke CKEDITOR

Доброго времени суток!

Good day time,

<script type="text/javascript" src="js/jquery-1.8.3.js"></script>

<script type="text/javascript" src="js/jquery-ui-1.9.0.custom.js"></script>
<script type="text/javascript" src="js/jquery-ui-1.9.0.custom.min.js"></script>
<script src="/ckeditor/ckeditor.js"></script>

<script >
    function red($numer){
    if (!document.getElementById($numer).className){
    document.getElementById($numer).className = document.getElementById($numer).className + "ckeditor";}
    $( 'textarea.ckeditor' ).ckeditor();
    
    }
</script>

...

<p onclick="red( <?php echo $row["numer"];?>)">red.</p>

...

<textarea id="<?php echo $row["numer"];?>" rows="10" cols="186"  name="namenews"  placeholder="Заголовок"><?php echo html_entity_decode($row["namenews"]);?></textarea>

I'm adding a class to textarea by using onclick and after that invoke  CKEDITOR to replace textarea with class "ckeditor"

But nothing happend. Firebug detected a bug:

TypeError: $(...).ckeditor is not a function

$( 'textarea.editor' ).ckeditor();

How to invoke CKEDITOR for replace  texarea with class="ckeditor", if the page is already loaded? 

Thanks.