Well can anyone tell me how to add redirection tab on website??

Case:: i have domain abc.com(say) and I want it to stay for 20 sec and then automaticall redirect it on other site??
Is there any readymade script for that.

put this in the header

<meta http-equiv="Refresh" content="20;url=http://www.newdomain.com/">

www.domain.com is the url where the user will be directed to after 20 seconds

Keep in mind that search engines frown on this method of re-directing. It's often used by spammers, just keep that in mind.

Yeah I don't recommend redirecting on the main page.