content: sub ShowMarkupGridScreen()
      ' create new instance of details screen
      m.markup = CreateObject("roSGNode", "MarkUp")
      ' m.posterGrid.content=m.contentTask.content 
      m.markup.observeField("rowlistbutton", "onButtonSelected2")
      ShowScreen(m.markup)
  end sub
  sub onButtonSelected2(event as Object)
      RunContentTask()
      ShowRowListScreen()
  end sub