applet

nogen der har nogen ide om hvorfor denne kode virker når jeg kører den i kawa men ikke i I.E browseren?
Koden er:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.text.NumberFormat;

public class Bmi extends JApplet
{
    public void init()
  {

        // construct components
        Color myColor = new Color(86,107,134);
        inputArea1 = new JTextArea(5,5);
        inputArea2 = new JTextArea(5,5);
        resultField = new JTextField(10);
        resultField.setEditable(false);
        Dimension size = new Dimension(80,20);
        calcButton = new JButton(\"Beregn\");
        calcButton.setPreferredSize(size);
        calcButton.addActionListener(new ButtonListener());
        BevelBorder edge = new BevelBorder(BevelBorder.RAISED);
        calcButton.setBorder(edge);

        JPanel inputPanel = new JPanel();
        inputPanel.setLayout(new GridLayout(3,1,5,5));
        inputPanel.add(inputArea1);
        inputPanel.add(inputArea2);
        inputPanel.add(calcButton);
        inputPanel.setBackground(myColor);
        inputPanel.setBorder
            (new TitledBorder(new EtchedBorder(), \"Beregn din BMI\"));

        JPanel outputPanel = new JPanel();
        outputPanel.add(resultField);
        outputPanel.setBackground(myColor);
        outputPanel.setBorder
            (new TitledBorder(new EtchedBorder(), \"Din BMI er:\"));

        JPanel centerPanel = new JPanel();
        centerPanel.setLayout(new GridLayout(3,1));
        centerPanel.setBackground(myColor);

        centerPanel.add(inputPanel);
        centerPanel.add(outputPanel);

        Container contentPane = getContentPane();
      contentPane.setLayout( new BorderLayout() );
        contentPane.add(centerPanel, \"Center\");

    }

    private JTextArea inputArea1;
    private JTextArea inputArea2;
    private JTextField resultField;
    private JButton calcButton;

    private class ButtonListener implements ActionListener
    {
        public void actionPerformed(ActionEvent event)
        {
            NumberFormat formatter = NumberFormat.getNumberInstance();

            formatter.setMaximumFractionDigits(0);
            formatter.setMinimumFractionDigits(0);

            String hoejdeString = inputArea1.getText();
            hoejdeString = hoejdeString.replace(\',\', \'.\');
            double hoejde = Double.parseDouble(hoejdeString);
            String vaegtString = inputArea2.getText();
            vaegtString = vaegtString.replace(\',\', \'.\');
            double vaegt = Double.parseDouble(vaegtString);
            double bmi= vaegt/(hoejde*hoejde);
            String result = \"\" + formatter.format(bmi);
            resultField.setText(result);
        }
    }
}