function ageFilter() {
    //Get start and end values
    var start = document.getElementById('start-age').value;
    var end = document.getElementById('end-age').value;
    var filtered = [];

    for (var i = 0; i < users.length; i++) {
        var user = users[i];
        if (users.age >= start && users.age <= end){
            filtered.push(user);
        }
    }
    console.log(filtered);

    return false;
}