displaying records in combo

Hi,
i want make an application using AJAX & .NET. using AJAX i will call webservice,i that i will write an select query which will fetch newly inserted records into the table,that records i want to display into combo.this ajax function i want to call in using settimeout function,so after few minutes it will again call the ajax function & that ajax function check new records into db & fill into combo.

can it is possible?if yes then pls tell me solun.

yes its possible.
You should really try to build it first and come back with specific questions pertaining to the areas your having problems with. I dont think a lot of people want to do your entire project for you.

hth,
mcm