onbeforeunload doesn't work properly in HTA

Discussion in 'Internet Explorer' started by David Mayerovitch, Dec 20, 2006.

  1. I want to prevent the user from accidentally exiting an HTA. When any
    attempt to close the application is made (such as clicking on the close
    button), a dialog should appear asking the user to confirm the exit. If the
    user clicks OK, the application closes; if the user clicks Cancel, the
    application remains open.

    I wanted to do this using the onbeforeunload event, and wrote the following
    HTA as a test. But the app always closes whether the user clicks OK or

    When I rename the file from Test.hta to Test.htm and run it in IE (and
    allowing blocked content), the file operates as intended and allows the user
    to cancel the exit.

    Can anyone explain why this method works for *.htm and not for *.hta? And
    can anyone suggest a way of accomplishing this in an HTA?


    The code:

    <title>Click the close button</title><head>
    applicationname="" version="1.0"
    icon="" windowstate="normal" navigable="yes"
    singleinstance="no" showintaskbar="yes"
    sysmenu="yes" caption="yes"
    border="thick" borderstyle="complex" innerborder="yes"
    maximizebutton="yes" minimizebutton="yes"
    scroll="no" contextMenu="yes"

    <script href="" type="text/javascript">


    function askQuit(){
    return("Really quit?");



    David Mayerovitch, Dec 20, 2006
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  2. Try the IE web developer forum


    Otherwise my guess would be that HTA implies a different security zone
    and you're seeing an effect from that.


    Robert Aldwinckle
    Robert Aldwinckle, Dec 22, 2006
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  3. Thanks, Robert. I've done as you suggested.

    David Mayerovitch, Dec 23, 2006
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