client side time ticker which call tick event without posting page

hi friends

I am designing a common room real time chat disscussion using ajax
I have two div tags
one for common massages
and other one for people in disscussion

I used asynchronous callback functions to papulate two div tags

what i want is i should have javascript time ticker
which after a specific time interval should fire callback function
so that div tags may be papulated on every timer tick
it shold be asynchronous call and whole page should not post

thanx in advance

And what are you having trouble with. No one will write your code for you. You using setTimeout or setInterval?

Eric