Is it possible to refresh partial frequently using Ajax?

Question

In background, I want it to reload and shows the number how many unread messages are there.
I want that without refreshing page. I mean using ajax.

If I had t

Answer 1

Yes you can

This page will refresh every 5 seconds. This is because we're using the 'onload' event to call our function. We are passing in the value '5000', which equals 5 seconds.
But hey, try not to annoy your users too much with unnecessary page refreshes every few seconds!

Source: http://www.quackit.com/javascript/javascript_refresh_page.cfm