Tuesday, August 7, 2007

How to auto-submit a form

Sometimes it's useful to pass data to a hidden page that processes the data then passes the new data to another page. To pass the data through forms, use javascript. Set a body onload function with $("form_name").submit() to submit the form when the page finishes loading.

Example:

<?php
  ....data processing code here
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"\n
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
    <script type="text/javascript" src="javascripts/prototype.js"></script>
  </head>
  <body onload="$('newdata').submit()">
    <form id="newdata" name="newdata" method="post" action="newviewer.php">
      <input type="hidden" id="data1" name="data1" value="x1">
    </form>
  </body>
</html>
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2 comments:

Eugene said...

Thanks! Just what I needed.

February 5, 2009 at 10:14 AM
Eric Schoeller said...

hehe this makes no sense to me where is prototype.js !!!??

December 6, 2010 at 2:23 AM

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