function message(message_text, message_type='success') {

    id=random_string(); //личная функция

    html='<div id="'+id+'" class="alert alert-'+message_type+'">n' +
        '  <button type="button" class="close" data-dismiss="alert">×</button>n' +
        ' '+message_text+' ' +
        '</div>';

    jQuery('#message_box').prepend(html);

    if(message_type=='success') {
        $('#message_box #'+id).fadeTo(2000, 500).slideUp(500, function(){
            jQuery('#message_box #'+id).remove();
        });
    }
}