private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
		this.mail = readList.get(index);
		String header = ":" + mail.getFrom() + "\n" + ":"
				+ mail.getSubject() + "\n";
		if (!"".equals(mail.getCc()))
			header += ":" + mail.getCc() + "\n";
		header += "ʱ:" + mail.getTime();
		headerTextArea.setText(header);

		String content = mail.getContent();
		contentTextArea.setText(content);

		if ("".equals(mail.getExtraFilename()))
			extraToolBar.setVisible(false);
		else {
			String con = mail.getExtraFilename();
			fileLabel.setText("" + con.substring(0, con.indexOf("\n\n")));
			extraToolBar.setVisible(true);
		}

	}