function topic_list_load(topic_num, s_num, where) {
    var o_data = document.getElementById(where);
    var url = "/api/thread/" + String(topic_num) + "?render=1&num=" + String(s_num);
    var n_data = "";

    var xhr = new XMLHttpRequest();
    xhr.open("GET", url, true);
    xhr.send(null);

    xhr.onreadystatechange = function() {
        if(this.readyState === 4 && this.status === 200) {
            var t_data = JSON.parse(this.responseText);
            for(key in t_data) {
                n_data += t_data[key]['data'];
            }

            o_data.innerHTML = n_data;
        }
    }

}