How to call Flex app from Javascript in portal question

I've setup my flex 4 app with a callback function. The flex app is embedded in a Java portlet on a WebLogic Portal 10.3.2. How can I call the Flex app from the portlets javascript function? Code below shows how the flex app is embedded in the wrapper jsp.
<script language="JavaScript" type="text/javascript">
        AC_FL_RunContent(
                    "src", "<%= srcPath %>",
                    "id", "<%= (String)request.getAttribute("portlet_name") %>",
                    "name", "<%= (String)request.getAttribute("portlet_name") %>",
                    "width", "<%= request.getAttribute("width") %>",
                    "height", "<%= request.getAttribute("height") %>",
                    "align", "middle",
                    "quality", "high",
                    "FlashVars", "PORTLET_WS=<%= request.getAttribute("window_state")%><%= wsrpEncodedChannel %>",
                    "allowScriptAccess","sameDomain",
                    "type", "application/x-shockwave-flash",
                    "pluginspage", "http://www.adobe.com/go/getflashplayer");
</script>

Thanks for the response. I followed the instructions in the link, but it does not appear to work within a Weblogic 10.3.2 portal. My Flex app is wrapped in a Java JSR 286 portlet. Should this approach work or is there a different approach for the portlets wrapper JavaScript to call a Flex callback function?
thanks
Dan

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