$(function() {
      $('#smFormBtn').click(function() {
        var fname = $('#fld_fname1').val();
        var lname = $('#fld_lname1').val();
        var mail = $('#fld_mail1').val();
        var phone = $('#fld_phone1').val();
        var start_date = $('#fld_start_date1').val();
        var end_date = $('#fld_end_date1').val();
        var persons = $('#fld_persons1').val();
        var type = $('#fld_type1').val();
        
        if (!fname || !lname || !mail || !phone || !start_date || !end_date || !persons || !type) {
            alert('Fill all obligatory lines!');
        }
        else {
            $.post('/__booking.php', {fname:fname,lname:lname,mail:mail,phone:phone,start_date:start_date,end_date:end_date,persons:persons,type:type}, function(ok) {
                if (ok) {
                    alert('Order sent!');
                }
                else {
                    alert('An error occured while ordering!');
                }
            });
        }
        
      });
    });