src/main/java/org/efaps/ui/wicket/components/links/LoadInTargetAjaxLink.java
@Override
    @SuppressWarnings("checkstyle:illegalcatch")
    public void onClick(final AjaxRequestTarget _target)
    {
        Instance instance = null;
        try {
            if (this.target.equals(ScriptTarget.TOP)) {
                final PageReference reference = ((AbstractContentPage) getPage()).getCalledByPageReference();
                if (reference != null) {
                    final UIMenuItem menuItem = (UIMenuItem) ((ContentContainerPage) reference.getPage()).getMenuTree()
                                    .getSelected().getDefaultModelObject();
                    final RecentObjectLink link = new RecentObjectLink(menuItem);
                    if (link != null) {
                        ((EFapsSession) getSession()).addRecent(link);
                    }
                }
            }
            final AbstractUIField uiField = super.getModelObject();
            if (uiField.getInstanceKey() != null) {
                Menu menu = null;
                try {
                    instance = uiField.getInstance();
                    menu = Menu.getTypeTreeMenu(instance.getType());
                } catch (final Exception e) {
                    if (menu == null) {
                        throw new EFapsException(LoadInTargetAjaxLink.class, "NoTreeMenu", instance);
                    }
                }

                final ContentContainerPage page = new ContentContainerPage(menu.getUUID(), uiField.getInstanceKey(),
                                uiField.getParent() instanceof UIStructurBrowser);
                final CharSequence url = urlFor(new RenderPageRequestHandler(new PageProvider(page)));
                // touch the page to ensure that the pagemanager stores it to be accessible
                getSession().getPageManager().touchPage(page);
                final StringBuilder js = new StringBuilder()
                    .append(this.target.key).append(".dijit.registry.byId(\"").append("mainPanel")
                    .append("\").set(\"content\", dojo.create(\"iframe\",{")
                    .append("\"id\": \"").append(MainPage.IFRAME_ID)
                    .append("\",\"src\": \"./wicket/").append(url)
                    .append("\",\"style\": \"border: 0; width: 100%; height: 99%\"")
                    .append("}));");
                _target.appendJavaScript(js);
            }
        } catch (final EFapsException e) {
            throw new RestartResponseException(new ErrorPage(e));
        }
    }
@Override
    @SuppressWarnings("checkstyle:illegalcatch")
    public void onClick(final AjaxRequestTarget _target)
    {
        Instance instance = null;
        try {
            if (this.target.equals(ScriptTarget.TOP)) {
                final PageReference reference = ((AbstractContentPage) getPage()).getCalledByPageReference();
                if (reference != null) {
                    final UIMenuItem menuItem = (UIMenuItem) ((ContentContainerPage) reference.getPage()).getMenuTree()
                                    .getSelected().getDefaultModelObject();
                    final RecentObjectLink link = new RecentObjectLink(menuItem);
                    if (link != null) {
                        ((EFapsSession) getSession()).addRecent(link);
                    }
                }
            }
            final AbstractUIField uiField = super.getModelObject();
            if (uiField.getInstanceKey() != null) {
                Menu menu = null;
                try {
                    instance = uiField.getInstance();
                    menu = Menu.getTypeTreeMenu(instance.getType());
                } catch (final Exception e) {
                    if (menu == null) {
                        throw new EFapsException(LoadInTargetAjaxLink.class, "NoTreeMenu", instance);
                    }
                }

                final ContentContainerPage page = new ContentContainerPage(menu.getUUID(), uiField.getInstanceKey(),
                                uiField.getParent() instanceof UIStructurBrowser);
                final CharSequence url = urlFor(new RenderPageRequestHandler(new PageProvider(page)));
                // touch the page to ensure that the pagemanager stores it to be accessible
                getSession().getPageManager().touchPage(page);
                final StringBuilder js = new StringBuilder()
                    .append(this.target.key).append(".dijit.registry.byId(\"").append("mainPanel")
                    .append("\").set(\"content\", dojo.create(\"iframe\",{")
                    .append("\"id\": \"").append(MainPage.IFRAME_ID)
                    .append("\",\"src\": \"./wicket/").append(url)
                    .append("\",\"style\": \"border: 0; width: 100%; height: 99%\"")
                    .append("}));");
                _target.appendJavaScript(js);
            }
        } catch (final EFapsException e) {
            throw new RestartResponseException(new ErrorPage(e));
        }
    }
Method to load something inside the opener window.

@param _target AjaxRequestTarget