Capturing a returned value from Javascript

> Can anyone point me towards an Aida example capturing a returned value
> from a Javascript script if one exists?  
>
> I am still trying to figure out how to capture the sort order after
> the user interacts with a sortable list created with
> WebElement>>beSortable.
>
> I can't seem to leave this one alone, although I have a working
> application using check boxes and "move up," and "move down" buttons
> to move items up and down in a list.  It DOES have the advantage of
> moving multiple elements at once, but I have had requests for a
> dragable list...
>
> After finding the following Javascript example:
> http://www.patmullin.com/weblog/2007/01/05/sortable-list-example-with-scriptaculous-and-phpmysql/, I thought I could maybe create a method like WebElement>>sortedList, which would take the serialized list from a a sortable WebElement (using WebElement>>beSortable), and return it, as in
>
> var listorder = Sortable.serialize('items_list');  (Javascript code)
>
> This was my start at it, (although I have no idea what the CDATA stuff
> is for!):
>
> WebElement>>sortedList
>     | script |
>     self registerId.
>     self app ensureJsResourceForScriptaculous.
>     self app ensureJavascriptForScriptaculousInHeader.
>    
>     script := '// <![CDATA[ Sortable.serialize(''', self id
> asString,''')    // ]]>'.
>     self scriptAfter: script
>
> I just don't know how to get the return value, which would be a string
> that I could parse, etc..., and write a nice method that would return
> a list of sorted WebElements...
>
> Just wondering...I know you are all busy...!