表单提交按钮在onsubmit返回false后不起作用

<form onsubmit="return validateForm()">
  <input type="text" id="name" required>
  <input type="email" id="email" required>
  <input type="submit" value="提交">
</form>

<script>
function validateForm() {
  // 进行表单验证
  var name = document.getElementById("name").value;
  var email = document.getElementById("email").value;

  if (name === "" || email === "") {
    alert("请填写所有必填字段");
    return false; // 验证失败，返回false，阻止表单提交
  }

  // 验证通过，可以提交表单
  return true;
}
</script>

<form onsubmit="return validateForm()">
  <input type="text" id="name" required>
  <input type="email" id="email" required>
  <input type="submit" value="提交" id="submitButton">
</form>

<script>
function validateForm() {
  // 进行表单验证
  var name = document.getElementById("name").value;
  var email = document.getElementById("email").value;

  if (name === "" || email === "") {
    alert("请填写所有必填字段");
    return false; // 验证失败，返回false，阻止表单提交
  }

  // 验证通过，禁用提交按钮
  document.getElementById("submitButton").disabled = true;

  // 可以提交表单
  return true;
}
</script>