ClientInfo info = RequestCycle.get().getClientInfo();
		if (info instanceof WebClientInfo)
		{
			/**
			 * only IE 9 supports canvas natively.
			 */
			WebClientInfo webinfo = (WebClientInfo) info;
			if (webinfo.getProperties().isBrowserInternetExplorer()
				&& webinfo.getProperties().getBrowserVersionMajor() < 9)
				wiQueryResourceManager
					.addJavaScriptResource(JQPlotExcanvasJavaScriptResourceReference.get());
		}