Exit on ESC in Wicket ModalWindow

//Every modal dialog will extend this class

public class ModalPanelContainer extends ModalWindow implements IHeaderContributor {



    //the magic is in this method

    @Override

    public void show(final AjaxRequestTarget target) {

        if (!isShown()) {

            final AppendingStringBuffer buffer = new AppendingStringBuffer(500);

            buffer.append("function mwClose(ev) {\n" +

                    "var code = ev.keyCode || ev.which;\n" +

                        "if (code == 27) { " +

                            getCloseJavacript() +

                        "};" +

                    "}");

            buffer.append("jQuery(document).keypress(mwClose);\n");

            target.appendJavascript(buffer.toString());

        }

        super.show(target);

    } 







}