How to check if a user did a specified action in a iframe
<p>Dear Stack Overflow users :),</p>

<p>i have a question regarding a little script im trying to build.</p>

<p>A user is klick on my homepage on pay now.
That opens a window where he have to enter his ID a notice (optional) a PIN and a re-Chapta code.</p>

<p>If everything works fine the user is going to be redicted on a page wich says him:
"Transaction compleate!"</p>

<p>How can i check if he really got this ?</p>
