alternatives bild für flash anzeigen lassen (ohne javascript)

<script language=JavaScript>

    function FlashInstalled()
    {
    	result = false;

    	if (navigator.mimeTypes && navigator.mimeTypes['application/x-shockwave-flash'])
    	{
    		result = navigator.mimeTypes['application/x-shockwave-flash'].enabledPlugin;
    	}
    	else if (document.all && (navigator.appVersion.indexOf("Mac")==-1))
    	{
 		// IE Windows only -- check for ActiveX control, have to hide code in eval from Netscape (doesn't like try)
 		eval ('try {var xObj = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");if (xObj)	result = true; xObj = null; } catch (e)	{}');
    	}
    	return result;
    }

    if (FlashInstalled()){
    document.location="menuswf.htm";// flashseite
    }else{
    document.location="menuhtml.htm";// HTML seite wenn kein flash
    }

    </script>
    <noscript>
    hier der inhalt fuer weder flash noch javascript
    </noscript>