[themes] a submenu a bit different

I show you my menu in my home: Menu http://groups.drupal.org/files/menu_0.png And this is what i need when people click in <<'musical services'>>, isn't a hover or on:click. I mean, when musical-services page loads, it loads the submenu too. submenu http://groups.drupal.org/files/submenu.png How do i do this, any tutorial or something? Thank you, Jorge.   ________________________________ Jorge