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