Flash will detect whether the available.
This module made of WebModule.
<script src="lib/WebModule.js"></script>
<script src="lib/FlashReady.js"></script>
window.onload = function() {
var flash = new FlashReady({
swf: "as3/FlashReady/bin/FlashReady.swf",
callback: function(ready) {
console.log("flash.ready", flash.ready);
alert(ready);
}
});
}