jQuery数据表合并吗？

Question

I am using the jQuery data plugin, and with initialising my page, I do an AJAX call to fill the table. Then, every 1.5 seconds I do another AJAX call to get the new info, I then clear the table, and fill it again.

Is there a way for me to check if the new JSON from the new AJAX call is different to the current, and then edit just those cell(s) to the new value, so I don't have to completely refresh my table every time?

Thanks!