function changeSolution(object){
    var obj = document.getElementById(object.id);
    var idObj = document.getElementById(object.id).id;
    var elem = document.getElementById("onglet");
    var actualClass = obj.className;
    for(i=1; i<4; i++){
        if (idObj.indexOf(i)>0){
            document.getElementById("solution"+i).style.display = 'block';
            obj.className = 'ongletSelected';
            j = i;
        }
    }
    for(i=1; i<4; i++){
        if (j!=i){
            document.getElementById("solution"+i).style.display = 'none';
            document.getElementById("onglet"+i).className = 'ongletOff';
        }
    }
}