How to click the tag <input type="submit" name="submit" id="submit" value="Publish this ad"> on this kind of form? <form name="publish_form" id="publish_form" method="post" action="http://www.example.com/jobs/publish/xxxxx/">     <fieldset>         <div class="right">             <div class="suggestion">If you changed your mind, you may <a href="http://www.example.com/jobs/deactivate/xxxxx/" title="cancel posting this ad">cancel posting this ad</a><