private void menu4_2_PreviewMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
 {
     // TODO: Add event handler implementation here.
     Communicate.PageDocIssue m_PageDocIssue = new Communicate.PageDocIssue();
     FrameMiddleContent.Navigate(m_PageDocIssue);
 }
 private void menu3_1_PreviewMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
 {
     Communicate.PageDocIssue m_PageDocIssue = new Communicate.PageDocIssue();
     FrameMiddleContent.Navigate(m_PageDocIssue);
 }