JQuery :: Submit Multiple Checkboxes Via Ajax To PHP Script

I am working on improvements for a web app. It currently submits checkboxes to a php script for processing by simply submitting the form naturally. However I require this action using a ajax post to save bandwidth etc. and im struggling to work out how to do this. I am familiar with normal ajax posts using jquery but here I need to post an array.

Simplified a little this is what I have.
<input type="checkbox" name="ckdOrd[]" value="1" id="order_1" />
<input type="checkbox" name="ckdOrd[]" value="2" id="order_2" />
<input type="checkbox" name="ckdOrd[]" value="3" id="order_3" />
<input type="checkbox" name="ckdOrd[]" value="4" id="order_4" />

It used to build an array ckdOrd[] and post to a php script with a loop for processing. It needs to post the order numbers as an array for processing. Is there a way to simply create the same post using ajax jQuery?

The PHP simply does something like this
//get posted array
$ckdOrd=$_REQUEST['ckdOrd'];
foreach
$ckdOrd as $key => $ord_no {
//update mysql here
}