问For循环中的For循环Javascript

EN

for (var i = 0, len = data.ORDER_STATUS[0].ORDERS.length; i < len; i++) {
  if (data.ORDER_STATUS[0].ORDERS[i].SEC_TYPE == "MLEG") {
    for (var i = 0; i < data.ORDER_STATUS[0].ORDERS[i].LEGS.length; i++) {
      LEGS += '<tr class="MLEGS"><td class="orderFirst">' +
        data.ORDER_STATUS[0].ORDERS[i].LEGS[i].SYMBOL +
        '</td><td>' + data.ORDER_STATUS[0].ORDERS[i].LEGS[i].ACTION +
        '</td><td>' + data.ORDER_STATUS[0].ORDERS[i].LEGS[i].QTY +
        '</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
    }
  }
}