function changeFamille(){
    var id_famille = document.getElementById("rech_famille").value ;
    var xhrChangeFamille = null ;
    try{
	  xhrChangeFamille = new XMLHttpRequest(); 
	}
	catch(e){ 
      try{
	    xhrChangeFamille = new ActiveXObject("Msxml2.XMLHTTP"); 
	  } 
      catch (e2){ 
        try {
	      xhrChangeFamille = new ActiveXObject("Microsoft.XMLHTTP"); 
		} 
        catch (e) {}
	  }
    }
	xhrChangeFamille.onreadystatechange  = function(){ 
      if(xhrChangeFamille.readyState==4){
        if(xhrChangeFamille.status==200){
	      document.getElementById("div_rech_sous_famille").innerHTML = xhrChangeFamille.responseText ;
	    }
      }
    }; 
	var param = "" ;
	param+="id_famille="+id_famille ;
    xhrChangeFamille.open("POST", "php/recherche_change_famille.php", true);
    xhrChangeFamille.setRequestHeader('Content-Type','application/x-www-form-urlencoded'); 
    xhrChangeFamille.send(param) ;
  }
  function direct(val){
    document.direct.start.value = val ;
    document.direct.submit() ;
  }