}
}
});
fp.addButton(btn);
panel.addSubmitCompleteHandler(new SubmitCompleteHandler() {
public void onSubmitComplete(SubmitCompleteEvent event) {
String html=event.getResults().trim();
if(html.contains("[[uri=")){
if(callback!=null){
String value=html.substring(html.indexOf("[[")+6, html.indexOf("]]"));