当所有字段都输入正确后，如何使用javascript启用"create account“按钮？

// 获取所有字段的输入框元素
const firstNameInput = document.getElementById('first-name');
const lastNameInput = document.getElementById('last-name');
const emailInput = document.getElementById('email');
const passwordInput = document.getElementById('password');

// 获取"create account"按钮元素
const createAccountButton = document.getElementById('create-account-button');

// 监听所有字段的输入事件
firstNameInput.addEventListener('input', enableCreateAccountButton);
lastNameInput.addEventListener('input', enableCreateAccountButton);
emailInput.addEventListener('input', enableCreateAccountButton);
passwordInput.addEventListener('input', enableCreateAccountButton);

// 启用或禁用"create account"按钮的函数
function enableCreateAccountButton() {
  // 检查所有字段是否都已输入正确的内容
  const firstNameValid = firstNameInput.value.trim() !== '';
  const lastNameValid = lastNameInput.value.trim() !== '';
  const emailValid = validateEmail(emailInput.value.trim());
  const passwordValid = passwordInput.value.trim() !== '';

  // 如果所有字段都输入正确，则启用按钮，否则禁用按钮
  createAccountButton.disabled = !(firstNameValid && lastNameValid && emailValid && passwordValid);
}

// 邮箱验证函数示例（仅作示意，具体验证逻辑需根据实际情况编写）
function validateEmail(email) {
  // 此处编写验证邮箱的逻辑，返回true或false
  return email.includes('@');
}