Close popup form after n seconds

[programuotojas]

I have a form that looks like this:

<form method="POST" action="'.$_GET[site].'/login.php" name="forma"><br>
Userid:<br><input type="text" name="userid" value="'.$_GET[user].'"><br>
Password:<br><input type="password" name="password" value="'.$_GET[pass].'"><br>
<input type="submit" name="login" value="Login">
</form>

A line in the body submits this form OnLoad. What i need is a way to close the popup that this has opened after say 20 seconds. The popup is NOT on my page and out of my control. Any suggestions ?

[programuotojas]

i have a theory - maybe i could put it in an iframe, so i wouldn't loose control over it ? But i don't know how to implement this

[programuotojas]

Executed exactly what i wanted bi using an iframe. Sorry for the multi-post, couldn't find the edit button...