<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html> <head> <title></title> <style type='text/css'> div { position: absolute; padding: 10px; border: 1px solid black; opacity: 0.7; background: #ccc; } #div1 { top: 0; right: 0; bottom: 0; left: 0; } #div2 { top: 20px; right: 20px; bottom: 20px; left: 20px; } </style> </head> <body> <div id='div1'> div1 </div> <div id='div2'> div2 </div> </body></html>