I want to show a countdown timer on the top right corner of my ASP page. It should start from 00:00:30 and decrement it to 00:00:00. Then it again start from 30 sec.
Can anyone help me?
That's a job for javascript. Just put some html like this on the page:
<span id="CountdownTime"></span>
And use javascript's setTimeout() and getElementById() functions along with the span's innerHTML property. Since this is kind of basic I'll leave the actual code as an exercise for the reader.