how to update the table data with the dropdown box fields?

Hi i have a table called "streams" with columns "name" and "interlace".

Using below code :

<select name="Interlaced">         <option>Yes</option>         <option>No</option>           </select>

using above code am creating dropdown box with fields "yes" and "no". Here what i want to do is if i select the interlace field as "Yes" it should be updated in streams table while i am entering new stream details in stream table.

thanks Srikanth