Step to delete all messages at once in Yahoo Mail?

Its a very easy task to delete all mail from your in-box.just you have to do is log in to Yahoo Mail Beta, which resembles an outlook express program:

* If you are unable then change your layout to yahoo mail beta .
* Use Firefox or IE to make sure AJAX works well.
* You will see all the messages in one page (as in outlook express program)
* Press Ctrl-A after selecting any message in the in-box.
* Hit Delete.
* Your inbox should be clear by then.
* Repeat for all the folders, if you have many folders.
This is the simple way to delete all mail from yahoo mail in-box..!!