在一个div元素中设置多个背景图像（并指定他们的位置） - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    body {
      background: #00ff00 url("/examples/smiley.gif") no-repeat fixed center;
    }
  </style>
</head>

<body>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
  <p>This is some text</p>
</body>

</html>
        