Allies Xposs wrote:

> i must be refresh at 10 = 15 sec if user stand by at PENDING BILL page. because system must be always check input data sales from another computer...

This looks like a good candidate to use events. Then you won't be
polling each 10-15 seconds, but server will alert client when data is
ready. You can read more about events here:

http://www.flamerobin.org/events_paper.pdf

HTH

--
Milan Babuskov
http://www.flamerobin.org
http://www.guacosoft.com