CSS - Z-index, background images and hidden text-Search Engine friendly

<body> <h1><a rel="nofollow" href="http://www.sebastiansulinski.co.uk/web_design_tutorials/css/z-index.php" >Z-index, background images and hidden text-Search Engine friendly</a></h1> <p>In this tutorial I will explain how to use background images with a different tags to place them one on top of the other using absolute positioning and z-index.</p> <p><a href="http://www.tutcity.com/">More Tutorials</a></p> </body>