function afficherProduit() { 
  var b = document.getElementById("case_study");
  var p = document.getElementById("brochures");
  var c = document.getElementById("specsheets");
   
   
  if (document.formulaire.liste.value == 1) 
  { 
      if (b.style.display == "none") 
        b.style.display = "block"; 
  
  }
  else 
  { 
      b.style.display = "none";   
  } 
  if (document.formulaire.liste.value == 2) 
  { 
      if (p.style.display == "none") 
        p.style.display = "block"; 
  
  } 
  else 
  { 
      p.style.display = "none";   
  }
  if (document.formulaire.liste.value == 3) 
  { 
      if (c.style.display == "none") 
        c.style.display = "block"; 
  
  } 
  else 
  { 
      c.style.display = "none";   
  }
}

function afficherGamme() { 
  var d = document.getElementById("desktop");
  var n = document.getElementById("notebook");
  var s = document.getElementById("serveur");
  var w = document.getElementById("workstation");
  var t = document.getElementById("thinclient");
  var k = document.getElementById("stockage");
   
   
  if (document.formulaire.gamme.value == 10) 
  { 
      if (s.style.display == "none") 
        s.style.display = "block"; 
  
  }
  else 
  { 
      s.style.display = "none";   
  } 
  if (document.formulaire.gamme.value == 11) 
  { 
      if (w.style.display == "none") 
        w.style.display = "block"; 
  
  } 
  else 
  { 
      w.style.display = "none";   
  }
  if (document.formulaire.gamme.value == 12) 
  { 
      if (d.style.display == "none") 
        d.style.display = "block"; 
  
  } 
  else 
  { 
      d.style.display = "none";   
  }
  if (document.formulaire.gamme.value == 13) 
  { 
      if (n.style.display == "none") 
        n.style.display = "block"; 
  
  } 
  else 
  { 
      n.style.display = "none";   
  }
  if (document.formulaire.gamme.value == 14) 
  { 
      if (t.style.display == "none") 
        t.style.display = "block"; 
  
  } 
  else 
  { 
      t.style.display = "none";   
  }
  if (document.formulaire.gamme.value == 15) 
  { 
      if (k.style.display == "none") 
        k.style.display = "block"; 
  
  } 
  else 
  { 
      k.style.display = "none";   
  }
}