function barre(i,oui){
    var Obj1= document.getElementById('ref'+i);
    var Obj2=document.getElementById('nom'+i);
    if(oui){
        Obj1.style.textDecoration ='line-through';
        Obj2.style.textDecoration ='line-through';
    }else{
        Obj1.style.textDecoration ='none';
        Obj2.style.textDecoration ='none';
    }
}