如何使用Javascript验证Radio

<input type="radio" name="gender" value="male"> Male
<input type="radio" name="gender" value="female"> Female
<input type="radio" name="gender" value="other"> Other

function validateForm() {
  var radios = document.getElementsByName("gender");
  var isChecked = false;
  
  for (var i = 0; i < radios.length; i++) {
    if (radios[i].checked) {
      isChecked = true;
      break;
    }
  }
  
  if (!isChecked) {
    alert("Please select a gender.");
    return false;
  }
  
  // 其他验证逻辑...
  
  return true;
}

<form onsubmit="return validateForm()">
  <!-- 表单内容 -->
  <input type="submit" value="Submit">
</form>