javascript - 我写的这个函数有什么问题吗？

Question

为什么我的函数不起作用？我希望输入字段中的数字自动添加到“下部总计”框中。

      3 of a kind: <input type="text" name="qtyB">
      <br>
      4 of a kind: <input type="text" name="qtyB">
      <br>
      Full House: <input type="text" name="qtyB">
      <br>
      Little Straight: <input type="text" name="qtyB">
      <br>
      Lg. Straight: <input type="text" name="qtyB">
      <br>
      <b>Yahtzeebeshy:</b> <input type="text" name="qtyB">
      <br>
      Chance: <input type="text" name="qtyB">
      <br>
      Lower Section Total: <input type="text" id="LowerSectionTotal">

function findTotalB() {
  var arrB = document.getElementsByName('qtyB');
  var totB = 0;
  for (var i = 0; i < arrB.length; i++) {
    if (parseInt(arrB[i].value))
      totB += parseInt(arrB[i].value);
  }

  document.getElementById('LowerSectionTotal').value = totB;

}

Answer 1

function findTotalB() {
  var arrB = document.getElementsByName('qtyB');
  var totB = 0;

  for (var i = 0; i < arrB.length; i++) {
     var value = 0 ;

     try {
        value = parseInt(arrB[i].value.trim());
     } catch ( e ) {
     }

     totB += value ; 
  }

  document.getElementById('LowerSectionTotal').value = totB;

}