Question

我无法找到错误。我得到“无法读取未定义的属性'fn'以下是我的代码：

<body>
  <form name = "NumberForm">
    <h1>Please enter two numbers</h1>

    <font face="Courier New">
      First Number: <input name = "fn" size="50" type="text"><br>
      Last Number:&nbsp; <input name="ln" size="50" type="text"><br>
    </font>

    <input type="button" value="Submit" onclick="doSubmit()">

  </form>

  <script>
    function doSubmit()
    {
      var firstNumber = document.NumberForm.fn.value;//error is marked here
      document.write(firstNumber);
    }
  </script>

Answer 1

尝试使用document.forms [＆＃39; NumberForm＆＃39;]。fn.value

document.form_name.element_name.value给出“无法读取未定义的属性'fn'错误

1 个答案: