function montrecache(val)
{
 var v1=document.getElementById("onglet1"); 
 var v2=document.getElementById("onglet2"); 
 var v3=document.getElementById("onglet3"); 
 var v4=document.getElementById("onglet4"); 
 var v5=document.getElementById("onglet5"); 
 if ( val == "1" )
 {
  v1.style.display="block";
  v2.style.display="none";
  v3.style.display="none";
  v4.style.display="none";
  v5.style.display="none";
  document.getElementById("o1").className = "actif";
  document.getElementById("o2").className = "";
  document.getElementById("o3").className = "";
  document.getElementById("o4").className = "";
  document.getElementById("o5").className = "";
  
 }
 if ( val == "2" )
 {
  v1.style.display="none";
  v2.style.display="block";
  v3.style.display="none";
  v4.style.display="none";
  v5.style.display="none";
  document.getElementById("o1").className = "";
  document.getElementById("o2").className = "actif";
  document.getElementById("o3").className = "";
  document.getElementById("o4").className = "";
  document.getElementById("o5").className = "";
 }
 if ( val == "3" )
 {
  v1.style.display="none";
  v2.style.display="none";
  v3.style.display="block";
  v4.style.display="none";
  v5.style.display="none";
  document.getElementById("o1").className = "";
  document.getElementById("o2").className = "";
  document.getElementById("o3").className = "actif";
  document.getElementById("o4").className = "";
  document.getElementById("o5").className = "";
 }
 if ( val == "4" )
 {
  v1.style.display="none";
  v2.style.display="none";
  v3.style.display="none";
  v4.style.display="block";
  v5.style.display="none";
  document.getElementById("o1").className = "";
  document.getElementById("o2").className = "";
  document.getElementById("o3").className = "";
  document.getElementById("o4").className = "actif";
  document.getElementById("o5").className = "";
 }
 if ( val == "5" )
 {
  v1.style.display="none";
  v2.style.display="none";
  v3.style.display="none";
  v4.style.display="none";
  v5.style.display="block";
  document.getElementById("o1").className = "";
  document.getElementById("o2").className = "";
  document.getElementById("o3").className = "";
  document.getElementById("o4").className = "";
  document.getElementById("o5").className = "actif";
 }
}