if service.isEditView(node)
if service.isShowInputWindow()
service.getEditText()
end
local txt,s=node.text,""
local gb=node.getTextSelectionEnd()
if gb>0 then
s=utf8.sub(txt,gb,gb)
if gb>=2 and gb<utf8.len(txt) then
txt=utf8.sub(txt,1,gb-1)..utf8.sub(txt,gb+1,-1)
elseif gb==1 then
txt=utf8.sub(txt,gb+1,-1)
else
txt=utf8.sub(txt,1,gb-1)
end
service.setText(node,txt)
service.setSelection(node,gb-1)
    service.speak(s.."已删除")
   else
service.beep()
 end

elseif service.isSeekBar(node)
service.click({{"%主菜单$50","进度$50","0",}})
service.speak("0%")
else
if service.execute("向下滚动",node)
return true
else
service.execute("上滑翻页",node)
end
end
return true