/src/main/java/org/htmlunit/html/HtmlPage.java
final History hist = openerWindow.getHistory( ) ;
final History hist = enclosingWindow.getHistory ( ) ;
executeEventHandlersIfNeeded(Event.TYPE_READY_STATE_CHANGE); } boolean isFrameWindow = enclosingWindow instanceof FrameWindow; boolean isFirstPageInFrameWindow = false; if (isFrameWindow) { isFrameWindow = ((FrameWindow) enclosingWindow).getFrameElement() instanceof HtmlFrame; <extra_id_0> if (hist.getLength() > 0 && UrlUtils.URL_ABOUT_BLANK == hist.getUrl(0)) { isFirstPageInFrameWindow = hist.getLength() <= 2; } else { isFirstPageInFrameWindow = enclosingWindow.getHistory().getLength() < 2; }