js添加行删除行

                    id += "mdcYx";
                }
                var mess = "<input type='input' id='" + id + "'/>";
                cell.innerHTML = mess;
              
            }
        }
        function DelRow(tableID) {
            var tab = document.getElementById(tableID);
            var rowIndex = tab.rows.length - 1;
            if (rowIndex < 1) {
            alert("表头无法删除！")
            }
            else {
                tab.deleteRow(rowIndex);
            }
        }
        function DelRow(tableID) {
            var tab = document.getElementById(tableID);
            var rowIndex = tab.rows.length - 1;
            if (rowIndex < 1) {
                alert("表头无法删除！")
                return false;
            }
            else {
                return true;
            }
        }