Drop down box

How do I get my select form to select a value for $num_view and refesh the page? SELECT * FROM table_name ORDER BY n_id DESC LIMIT $num_view I now need a dropdown box that has set values for 5,10,15 and 20 so that the user can select a number of news articles to view and it will refresh the page and show that many? How can I do this without a button needing to be pressed? _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.