如何在下面的代码中添加确认密码部分？

<label for="password">密码：</label>
<input type="password" id="password" name="password" required>

<label for="confirm-password">确认密码：</label>
<input type="password" id="confirm-password" name="confirm-password" required>

document.getElementById("myForm").addEventListener("submit", function(event) {
  var password = document.getElementById("password").value;
  var confirmPassword = document.getElementById("confirm-password").value;

  if (password !== confirmPassword) {
    event.preventDefault(); // 阻止表单提交
    alert("密码和确认密码不一致，请重新输入。");
  }
});