};
                tr = table.createTHead();
                for (let row in class_json) {
                    let th = document.createElement("th");
                    th.innerHTML = row;
                    tr.appendChild(th);                       
                    index++;
                }
                body = table.createTBody();
                tr = body.insertRow();
                for (let row in class_json) {
                    let th = tr.insertCell();
                    th.innerHTML = sc