if ( document.images )
      {
//        var news_off = new Image();
//        news_off.src = "_images/_interfaces/alpha/boutons/Image7-off.png";
        var news_on = new Image();
        news_on.src = "_images/_interfaces/alpha/boutons/Image7-on.png";

//        var calendar_off = new Image();
//        calendar_off.src = "_images/_interfaces/alpha/boutons/Image8-off.png";
        var calendar_on = new Image();
        calendar_on.src = "_images/_interfaces/alpha/boutons/Image8-on.png";

//        var biography_off = new Image();
//        biography_off.src = "_images/_interfaces/alpha/boutons/Image9-off.png";
        var biography_on = new Image();
        biography_on.src = "_images/_interfaces/alpha/boutons/Image9-on.png";

//        var interviews_off = new Image();
//        interviews_off.src = "_images/_interfaces/alpha/boutons/Image10-off.png";
        var interviews_on = new Image();
        interviews_on.src = "_images/_interfaces/alpha/boutons/Image10-on.png";

//        var discography_off = new Image();
//        discography_off.src = "_images/_interfaces/alpha/boutons/Image11-off.png";
        var discography_on = new Image();
        discography_on.src = "_images/_interfaces/alpha/boutons/Image11-on.png";

//        var photos_off = new Image();
//        photos_off.src = "_images/_interfaces/alpha/boutons/Image12-off.png";
        var photos_on = new Image();
        photos_on.src = "_images/_interfaces/alpha/boutons/Image12-on.png";

//        var videos_off = new Image();
//        videos_off.src = "_images/_interfaces/alpha/boutons/Image13-off.png";
        var videos_on = new Image();
        videos_on.src = "_images/_interfaces/alpha/boutons/Image13-on.png";

//        var forum_off = new Image();
//        forum_off.src = "_images/_interfaces/alpha/boutons/Image14-off.png";
        var forum_on = new Image();
        forum_on.src = "_images/_interfaces/alpha/boutons/Image14-on.png";

//        var chat_off = new Image();
//        chat_off.src = "_images/_interfaces/alpha/boutons/Image15-off.png";
        var chat_on = new Image();
        chat_on.src = "_images/_interfaces/alpha/boutons/Image15-on.png";

//        var guestbook_off = new Image();
//        guestbook_off.src = "_images/_interfaces/alpha/boutons/Image16-off.png";
        var guestbook_on = new Image();
        guestbook_on.src = "_images/_interfaces/alpha/boutons/Image16-on.png";

//        var links_off = new Image();
//        links_off.src = "_images/_interfaces/alpha/boutons/Image17-off.png";
        var links_on = new Image();
        links_on.src = "_images/_interfaces/alpha/boutons/Image17-on.png";

//        var surveys_off = new Image();
//        surveys_off.src = "_images/_interfaces/alpha/boutons/Image18-off.png";
        var surveys_on = new Image();
        surveys_on.src = "_images/_interfaces/alpha/boutons/Image18-on.png";

//        var playmate_off = new Image();
//        playmate_off.src = "_images/_interfaces/alpha/boutons/Image19-off.png";
        var playmate_on = new Image();
        playmate_on.src = "_images/_interfaces/alpha/boutons/Image19-on.png";
      }

      // fin mise en cache des images