private void fon_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
fon.Visibility = Visibility.Hidden;
label2.Visibility = Visibility.Hidden;
ExitImage.Visibility = Visibility.Visible;
ChetForm.Visibility = Visibility.Visible;
PrimerLabel.Visibility = Visibility.Visible;
OtvetTextBox.Visibility = Visibility.Visible;
TimeLabel.Visibility = Visibility.Visible;
CancelImage.Visibility = Visibility.Visible;
SkipImage.Visibility = Visibility.Visible;
label3.Visibility = Visibility.Visible;
label4.Visibility = Visibility.Visible;
label4_Copy.Visibility = Visibility.Visible;
skiplabel.Visibility = Visibility.Visible;
falselabel.Visibility = Visibility.Visible;
truelabel.Visibility = Visibility.Visible;
HelpFaierImage.Visibility = Visibility.Visible;
OtvetTextBox.Focus();
exp = ge.GetExpression();
PrimerLabel.Content = exp.ToString();
timer_primer.Tick += new EventHandler(timer_primerTick);
timer_primer.Interval = new TimeSpan(0, 0, 0, 1);
timer_primer.Start();
}
