ah_jjzhgd_webscreen/js/publics/shuiYin.js

function addWatermark() {
    const watermarkDiv = document.createElement('div');
    watermarkDiv.className = 'watermark';
    watermarkDiv.textContent = ''; // 可以根据需要动态生成内容
    document.body.appendChild(watermarkDiv);
  }
  // 调用函数
  window.onload = addWatermark;