import flash.net.FileReference;

var allTypes:Array = new Array();

var imageTypes:Object = new Object();

imageTypes.description = "Images (*.jpg, *.jpeg, *.gif, *.png)";

imageTypes.extension = "*.jpg; *.jpeg; *.gif; *.png";

allTypes.push(imageTypes);

var listener:Object = new Object();

listener.onSelect = function(file:FileReference):Void {

trace("onSelect: " + file.name);}

var fileRef:FileReference = new FileReference();

fileRef.addListener(listener);

fileRef.browse(allTypes);