页面加载时检查日期

window.addEventListener('DOMContentLoaded', function() {
  var currentDate = new Date();
  var year = currentDate.getFullYear();
  var month = currentDate.getMonth() + 1;
  var day = currentDate.getDate();
  
  // 在页面中显示当前日期
  document.getElementById('date').textContent = year + '-' + month + '-' + day;
  
  // 根据日期动态展示内容
  if (month === 12 && day === 25) {
    document.getElementById('christmas').style.display = 'block';
  }
  
  // 限制用户操作
  if (currentDate < new Date('2022-01-01')) {
    document.getElementById('button').disabled = true;
  }
});