historyFrame.setId("__gwt_historyFrame");
historyFrame.getStyle().setProperty("position", "absolute");
historyFrame.getStyle().setProperty("width", "0");
historyFrame.getStyle().setProperty("height", "0");
historyFrame.getStyle().setProperty("border", "0");
body.appendChild(historyFrame);
History.fireCurrentHistoryState();
historyFrameInitialized = true;
}
}