function YaSpectacle(lejour, lemois, lannee) {
    //These params are string but may not be numeric
    //Sometime these params contains  
    var year = parseInt(lannee); //returns undefined if not numeric
    var month = parseInt(lemois);
    var day = parseInt(lejour);

    if (!day || !month || !year) {
        return false;
    }

    var key = year + "-" + month + "-" + day;

    if (arrayContains(daysWithPerformanceArray, key)) {
        return true;
    } else {
        return false;
    }
}

function arrayContains(array, value){
    var len = array.length;
    for(var i=0; i<len; i++){
        if(array[i]==value){
            return true;
        }
    }
    return false;
}