private void imgExit_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

         {

             if (MessageBox.Show("确定要退出当前页面？", "提示", MessageBoxButton.OKCancel) == MessageBoxResult.OK)

             {

                 //Silverlight调用JS

                 ScriptObject Show = HtmlPage.Window.GetProperty("closeWin") as ScriptObject;

                 Show.InvokeSelf();

             }

         }

 private void imgExit_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

         {

             if (MessageBox.Show("确定要退出当前页面？", "提示", MessageBoxButton.OKCancel) == MessageBoxResult.OK)

             {

                 HtmlWindow window = HtmlPage.Window;

                 window.Navigate(new Uri("Default.aspx", UriKind.Relative));

             }

         }