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Editorial Team
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Asked: 2026-05-23T10:23:26+00:00

I’m using the following code to open a blank window from a secure page:

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I’m using the following code to open a blank window from a “secure” page: 

$('#previewTemplate').click(function () {
            var preview = window.open('', 'PreviewTemplate', 'width=800,height=400,scrollbars=1');
            var html = '<html><head><title>Preview</title></head><body>' + $("#textbox").val() + '</body></html>';
            preview.document.open("text/html", "replace"); preview.document.write(html); preview.document.close(); return false;
        });

The blank window is opening as a secure page (preview.document.location.protocol=”https:”) so IE is barking about the mixed content because I have a non-secure image in the page. I’m trying to open up the blank window as a non-secure window. Trying to change the location.protocol to “http:” or location.port to 80 doesn’t seem to work. Is it possible to open up a blank “non-secure” window from within a secure page?

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1 Answer

  1. Editorial Team

    If the main window was https and the child window was http, the same origin policy would prevent the two from communicating with each other. i.e. those calls to preview.document.open would never work.

    Three options:

    • host the image from the same https
      domain as the parent window.
    • Instead of dynamically writing to the child window, just host a page on
      the same server as the image. Even
      if you can only put static html there
      for whatever reason, some basic
      javascript could be used to read the
      url’s query string and get the value
      of textbox.
    • Read up on window.postMessage. Only works
      in more modern browsers though.
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