表格操作

  function TableaddRow(id) {
        var tab = document.getElementById(id);
        if ($('#' + id).find('.firstRow').length > 0) {
            $("#" + id + " tr:not(':first')").remove();//除了首行，将其他行删除
        }
        var tabRows = tab.rows;
        var newTr = tab.insertRow(tabRows.length);
        var newTd0 = newTr.insertCell(0);
        var newTd1 = newTr.insertCell(1);
        var newTd2 = newTr.insertCell(2);
        var newTd3 = newTr.insertCell(3);
        var newTd4 = newTr.insertCell(4);
        var newTd5 = newTr.insertCell(5);
        newTd0.innerHTML = '';
        newTd1.innerHTML = '';
        newTd2.innerHTML = '';
        newTd3.innerHTML = '';
        newTd4.innerHTML = '';
        newTd5.innerHTML = '删除';
    }

    function deleteRow(obj) {
        var tr = obj.parentNode.parentNode;
        //找到表格
        var tbody = tr.parentNode;
        if (tbody.rows.length > 2) {
            //删除行
            tbody.removeChild(tr);
            //重置序号
            for (let i = 1; i < tbody.rows.length; i++) {
                tbody.children[i].children[0].children[0].value = i
            }
        }
    }