Koodijupp:

---

<form name='f1' action="p1.php" method="post">
<input type="hidden" name="p1">
<input type="hidden" name="p2">
<!-- so on -->
</form>

<form name='f2' action="p2.php" method="post">
<input type="text" name="p1" value="[some text]">
<!-- other form fields -->
<input type="button" value="go" onClick="doSubmit()">
</form>

<script><!--
function doSubmit()
{
  document.f1.p1.value = "my_hidden_param1";
  document.f1.p1.value = "my_hidden_param2";
  document.f1.submit();
  document.f2.submit();
}
//-->
</script>

---