jQuery and WP_Ajax_Response

I tried to use WP_Ajax_Response class to respond Ajax request, but then some data wrap with [CDATA], and found that I just can’t use jQuery .text() to grab the data inside that… here is how i resolved this problem

<?xml ....?>
<wp_ajax>
...
<supplemental>
<url><!&#91;CDATA&#91;http://.....&#93;&#93;></url>
</supplemental>
</wp_ajax>

var xml = $.parseXML(response),
    imgURL = $(xml).find('supplemental url').text()

first use jQuery function to parse the response, then use jQuery .text() method to retrieve the data within CDATA.