FileReference中的过滤器

private var smallBrowser:FileReference = new FileReference();
private function openBrowser():void{
var fileTypes:FileFilter = new FileFilter("FLV文件 (*.flv)","*.flv");
var allTypes:Array = new Array(fileTypes);
smallBrowser.browse(allTypes);
smallBrowser.addEventListener(Event.SELECT, handleOpenBrowser);
}
private function handleOpenBrowser(event:Event):void{
trace("Selected!"+smallBrowser.name);
}