public void txtChanged(DocumentEvent e) {

		if (e.getDocument() == formMain.txtCustName.getDocument()) {
			txtCutomerNameChanged();
		} else if (e.getDocument() == formMain.txtDvdName.getDocument()) {
			txtDvdNameChanged();
		} else if (e.getDocument() == formMain.txtDvdId.getDocument()) {
			txtDvdCodeChanged();
		}

	}