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Asked: 2026-05-10T16:59:31+00:00

I have an HTML page (say welcome.html) which contains an iframe to a page

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I have an HTML page (say welcome.html) which contains an iframe to a page I have no control over (say app.html). The user performs some actions using the app within the iframe and clicks submit. Once they do this, they are taken to a new page (say thanks.jsp), which loads within the iframe. Is there a way in which I can force thanks.jsp to load in the full frame and not the iframe once submit is clicked? Remember, I have no control over the logic behind that Submit button or app.html. I do however have control over welcome.html and thanks.jsp. If possible, I would like to stick with HTML and/or JavaScript. Thank you in advance.

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1 Answer

  1. You probably want to use a framebuster, with a base target in case it fails.

    First:

    If thanks.jsp is requested via a post request – redirect so it you present the page as the response to a get request.

    Then:

    Include framebuster JavaScript:

    <script type='text/javascript'>    if (self != top) { top.location.replace(location); } </script>

    Finally:

    In case the user doesn’t have JavaScript enabled, make sure they don’t stay in the frame any longer then they have to:

    <base target='_top'>
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