Fotiman - 6:50 pm on Aug 30, 2011 (gmt 0)

Sounds to me like both of the issues I mentioned could be causing you problems. So first I would move the call to load to be within the callback function of the post. This is to make sure that your add happens before your call to load. Then as a simple way to prevent caching, you can append a unique querystring to the URL, like a timestamp. For example:

load('display.php?ck=' + (new Date()).getTime());