ok, here it is
< fc:renderHTML chartId="devices"
filename="myProjects/fusion/power/DragNode.swf"
width="900" height="600"
xml="#{charts.devicesXML}" />
i can use it to display fusioncharts and fusionmaps very well, but with powercharts, "invalid xml data" problem happens. And i'm sure there's nothing wrong with the xml String.
Thanks.