<!--
      function ChangeMenuPrincipal(Image,Etat,Numero)
        {
          if (document.images)
            if (Etat)
              Image.src=MenuPrincipalImages2[Numero].src
            else
              Image.src=MenuPrincipalImages1[Numero].src;  
        }
      function MenuPrincipalImg2()
        {
          this[1] = new Image(); this[1].src = "../menu/ch1on.gif";
          this[2] = new Image(); this[2].src = "../menu/ch2on.gif";
          this[3] = new Image(); this[3].src = "../menu/ch3on.gif";
          this[4] = new Image(); this[4].src = "../menu/ch4on.gif";
          this[5] = new Image(); this[5].src = "../menu/ch5on.gif";
        }
      function MenuPrincipalImg1()
        {
          this[1] = new Image() ; this[1].src = "../menu/ch1off.gif";
          this[2] = new Image() ; this[2].src = "../menu/ch2off.gif";
          this[3] = new Image() ; this[3].src = "../menu/ch3off.gif";
          this[4] = new Image() ; this[4].src = "../menu/ch4off.gif";
          this[5] = new Image() ; this[5].src = "../menu/ch5off.gif";
        }
      if (document.images)
        {
          var MenuPrincipalImages2 = new MenuPrincipalImg2();
          var MenuPrincipalImages1 = new MenuPrincipalImg1();
        }
// -->