}
@Override
public void renderHead(org.apache.wicket.markup.head.IHeaderResponse response)
{
WebClientInfo info = WebSession.get().getClientInfo();
/**
* only IE 9 supports canvas natively.
*/
if (info.getProperties().isBrowserInternetExplorer()
&& info.getProperties().getBrowserVersionMajor() < 9)
{
// wiQueryResourceManager.addJavaScriptResource(JQPlotExcanvasJavaScriptResourceReference.get());
response.render(JavaScriptHeaderItem
.forReference(JQPlotExcanvasJavaScriptResourceReference.get()));
}