private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)        {            webBrowser1.Document.Window.Error += new HtmlElementErrorEventHandler(Window_Error);                               }        void Window_Error(object sender, HtmlElementErrorEventArgs e)        {            e.Handled = true;        }

记得要在webbrowser的事件上绑定

webBrowser1_DocumentCompleted