Multiple checkboxes and multiple textboxes

Hi, I have a form that has something like this: <input type=checkbox name=url[] value='http://somesite' checked> <a href='http://somesite' target=a>somesite</a> <br><input type=text name=txt[] size=75 value='some desc'> <input type=checkbox name=url[] value='http://somesite1' checked> <a href='http://somesite1' target=a>somesite1</a> <br><input type=text name=txt[] size=75 value='some desc1'> <input type=checkbox name=url[] value='http://somesite2' checked> <a href='http://somesite2' target=a>somesite2</a> <br><input type=text name=txt[] size=75 value='some desc2'> As you can see from the above, theses a checkbox (url[]) which holds the value of the URL and a textbox (txt[]) which holds some description text, in the above there are only 3 rows but actually there are 200 per page. When the form is submitted how do I make sure that if url[] is unchecked even txt[] should not be taken? These values will be entered into the database so I need proper "matching pairs" of URL and TXT Thanks, Ryan