JSFiddle - React, Tailwind, and code Playground

HTML

<img id="background" src="http://i577.photobucket.com/albums/ss220/emmylou03/th_glitter_background_b1.gif" alt="" />

<div id="content">
  Your content
</div>

CSS

#background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

#content {
  position: relative;
  z-index: 1;
}


<!--[if IE 6]>
  <style type="text/css">
    html {
      overflow-y: hidden;
    }

    body {
      overflow-y: auto;
    }

    #background {
      position:absolute;
      z-index:-1;
    }

    #content {
      position:static;
    }
  </style>
<![endif]-->