Jquery Ajax Request Data Not Send

i am trying some idea on a ajax send,but i can't find why this code can't not send any parameter to jsp and thorw the nullpointerException. I fix my code here,thanks for reponse. v

Solution 1:

Change your data to:

data: { dataVar : dataVal }

and your dataType to

dataType: isJSON ? "JSON" : "text

They both don't accept functions.

data accepts plain object or string and dataType accepts only string