Is Opera Turbo on?

I've got a page which uses Flash with animations (These are not crucial but additional).

Everything works fine, if I'm not using Opera with activated Turbo. Then the Flash Movie is shown as a big ugly arrow in a circle the size of the flash movie which is intended to act as a play button for the flash.

I'm using SWFobject, so I easily could turn of the animation if I knew if Opera's turbo mechanism is used, but how do I do this in JavaScript (or maybe CSS if this goes)

How to reproduce?
Surf this page with Opera (or any other page which uses flash)
http://www.adobe.com/software/flash/about/
Without Opera Turbo you see a flash animation and flash version information With Opera Turbo you see two white arrows in gray circles

edit 1 I'm quite sure now, that there is not a pure JS solution and not a PHP solution. The best guess is a combined AS/JS solution.

Solution

You can try to check if the flash object is loaded with some javascript. This code works on my computer with Opera 11:

<html>
<head>
  <script language=JavaScript>
    function isFlashBlocked(){
      var blocked;
      try {
        // Can test this on any flash object on the page
        window.document.myFlash.SetVariable("dummy", "dummy");
        // Flash not blocked
        blocked = false;
      }
      catch(err) {
        // Flash blocked
        blocked = true;
      }

      return blocked;
    }

    function removeBlockedFlash() {
      if (isFlashBlocked()) {
        // Hide all flash objects
        window.document.myFlash.setAttribute("style", "display: none");
        // ...

        // Display replacement content
        window.document.myImage.setAttribute("style", "display: inline");
        // ...
      }
    }
  </script>
</head>
<body onload="removeBlockedFlash()">
  <object type="application/x-shockwave-flash" data="HelloWorld.swf" 
          width="100" height="100" id="myFlash">
  </object>
  <img src="image.jpg" style="display: none" id="myImage" />
</body>
</html>

If you detect that flash is blocked, you hide every flash object and display what you want.

Edit: This code doesn't work with Firefox, you probably need to detect the browser before using this function.