How to use

renderHead

method

in

org.apache.wicket.extensions.markup.html.tree.DefaultAbstractTree

@Override
public void renderHead(HtmlHeaderContainer container) {
  super.renderHead(container);
  WebClientInfo info = (WebClientInfo) getRequestCycle().getClientInfo();
  if (info != null) {
    String userAgent = info.getUserAgent().toLowerCase();
    if (userAgent.indexOf("msie 6") > -1) {
      container.getHeaderResponse().renderJavascriptReference(IE6_HOVER_FIX);
      container
          .getHeaderResponse()
          .renderOnDomReadyJavascript(
              "fixIE6Hover('row', 'div', 'context-hover'); fixIE6Hover('row-selected', 'div', 'context-hover-selected');");
    }
  }
}