Safari 5.1.2 on Windows 7 has issues with hiding SWF objects in IFRAMEs

Question

Try as I may I cannot hide a Flash object in an HTML page referenced as the source of an IFRAME tag despite being able to hide the IFRAME when using Safari 5.1.2 on a Windows 7 machine.
This is not a problem for the latest versions of Safari, Chrome and Firefox on a Mac. This is not a problem for the latest versions of Internet Explorer, Chrome and Firefox on a Windows 7 machine.
Following is sample HTML and JavaScript for the page that includes the IFRAME tag:
<button id="tryit" type="button">Try It</button>
<div id="test">
     <iframe src="hideswf-iframe.html" width="770" height="610" frameborder="0"></iframe>
</div>
<script type="text/javascript">
     var test = document.getElementById("test"),
          tryit = document.getElementById("tryit");
     tryit.addEventListener( "click", hideAndSeek, false );
     function hideAndSeek(e) {
          var style = test.style;
          style.opacity = (style.opacity == 1 || style.opacity == "") ? 0 : 1;
</script>
And the following is the OBJECT tag for the SWF object that would exist in the page "hideswf-iframe.html" referenced as the source of the IFRAME tag in the above code block:
<object type="application/x-shockwave-flash" id="strobemediaplayback" data="StrobeMediaPlayback.swf" width="743" height="600" style="visibility: visible; ">
     <param name="allowFullScreen" value="true">
     <param name="wmode" value="direct">
     <param name="flashvars" value="favorFlashOverHtml5Video=true&swf=StrobeMediaPlayback.swf&javascriptCallbackFunction=$.fn.strobemediaplayback.triggerHandler&minimumFlashPlayerVersion=10.0.0&expressInstallSwfUrl=expressInstall.swf&autoPlay=false&loop=false&controlBarMode=docked&poster=&src=http://players.edgesuite.net/videos/big_buck_bunny/bbb_448x252.mp4&useHTML5=false&width=1187&height=959&queryString=favorFlashOverHtml5Video=true&swf=StrobeMediaPlayback.swf&javascriptCallbackFunction=$.fn.strobemediaplayback.triggerHandler&minimumFlashPlayerVersion=10.0.0&expressInstallSwfUrl=expressInstall.swf&autoPlay=false&loop=false&controlBarMode=docked&poster=&src=http://players.edgesuite.net/videos/big_buck_bunny/bbb_448x252.mp4&useHTML5=false&width=1187&height=959">
</object>
The complex aspect is that this issue only manifests itself with some SWF objects, but not all. In the admittedly small sample of objects I tested I observed that the ones that failed were focused on video content (basically they were video players) while the ones that didn't exhibit the issues were not delivery mechanisms for video content.
I have already tried using JavaScript libraries and frameworks such as jQuery and Scriptaculous - they didn't fare any better.

Answer 1

Actually it doesn't let me choose either of the buttons and before anything can happen the crash occurs. I tried to click on both buttons but it seems not to work. Thanks!