fixed uncaught javascript exception when dragging pages
fixed uncaught javascript exception when dragging pages

luiseduardohdbackup/diem,luiseduardohdbackup/diem,PolibudaInfo/diem,PolibudaInfo/diem,luiseduardohdbackup/diem,luiseduardohdbackup/diem,PolibudaInfo/diem,PolibudaInfo/diem