The link is valid and opening at my side !
Anyways, Here is what learned in a day about AJAX response (Just a day old in AJAX )!
Ajax response either in text format OR in XML format i.e no object , no Array you can returned !
If you want to response the two array element , then you can append those two values in single
string separated by comma and when you receive this string , you can parsed it on JavaScript and display on JSP.
If you are OK with this, you can proceed !