Calling javascipt functions from flash

<script type="text/javascript">
swfobject.registerObject("myFlashContent", "9.0.0", "expressInstall.swf");
</script>


Here is my HTML which is used to show the flash

<div class="flash">
<object classid="clsid27CDB6E-AE6D-11cf-96B8-444553540000" width="258" id="myFlashContent">
<param name="movie" value="btnDemo.swf" />
<param name="allowscriptaccess" value="always" />
<!--[if !IE]>-->
<object type="application/x-shockwave-flash" data="btnDemo.swf" width="258">
<!--<![endif]-->
<img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" />
</a>
<!--[if !IE]>-->
</object>
<!--<![endif]-->
</object>
</div>