Form submitting inside an iFrame loads in the same iframe and not in a subiframe

Question

I created a script that submits a form to an iFrame (download.php):

<?php 
//Download.php
echo '<form id="secret" action="http://location.com" target="hidden" method="post">
<!--- There are some input hiddens -->
</form>';
echo '<iframe name="hidden"></iframe>';
echo "<script>
     window.onload = function() {
         secretsend();
         var form = document.getElementById('secret');
         form.onsubmit = function() {
              alert('TEST2');
         }
     }


     function parentsub() 
     {
         parent.document.getElementById('google').submit();
     }
     function secretsend() 
     {
         alert('TEST');
         document.getElementById('secret').submit();
     }
</script>";
?>

That works, but when secretsend() is loaded the form submits it to the main page (that is an iFrame, as I said before) and not to hidden iFrame, (the initial form changes its src to http://location.com/, the action url of the form)... How can I solve that issue?

I need that for call another function called parentsub() but if the main content is replaced is impossible that anything can be called.

Answer 1

Try using This code.

echo '<form id="secret" action="http://location.com" target="_self" method="post">

Target: _self attribute opens the linked document in same frame.