设置文档背景的样式 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function displayResult() {
      document.body.style.background = "#f3f3f3 url(" / examples / img_tree.png ") no-repeat right top";
    }
  </script>
</head>
<body>

  <h1>Hello World!</h1>
  <br>
  <button type="button" onclick="displayResult()">设置背景</button>

</body>
</html>
        