I suspect you didn't use Drupall's Form API - and you should. If you're not using it, then you can use the Form Examples in the Examples project to come up to speed on it - http://drupal.org/project/examples. The default behavior of the Form API is to not do what you're concerned about.
In Drupal, one would not normally use $_REQUEST, $_GET, and friends (or only as a last resort). Normally you use more Drupal-esqe APIs.
-Randy
I have added a form to a custom node using hook_view. My problem is
that if I refresh the browser after submitting the form it is
submitted again. Is there a way to avoid this?
I tried adding "$_REQUEST['destination'] = 'node/'.$nid; " at the end
of submit function but it don't work.
Thanks
--
*Les normes hi són perquè hi pensis abans de saltar-te-les
*La vida és com una taronja, què esperes a exprimir-la?
*Si creus que l'educació és cara, prova la ignorància.
*La vida és com una moneda, la pots gastar en el que vulguis però
només una vegada.
*Abans d'imprimir aquest missatge, pensa en el medi ambient.