Flex4桌面应用程序，用html5编写，如何在javascript中调用fx-script

Question

我有一个用html + javascript编写的简单项目，如何在flex4打包它，我需要在javascript中调用flex File API，但似乎不起作用，那么如何实现呢？

<script type="text/javascript"> function getSWFObject(movieName) { if(document[movieName]) { return document[movieName]; }else if(window[movieName]){ return window[movieName]; }else if(document.embeds && document.embeds[movieName]){ return document.embeds[movieName]; }else{ return document.getElementById(movieName); } } getSWFObject("test40").callback1();