height sets the height of the element.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> <style type="text/css"> * .container { position: relative; background: black; } * .box { position: absolute; width: 300px; left: auto; right: 10px; height: 100px; background: red; } * .before { z-index: 2; width: 100px; height: 400px; left: 400px; background: yellow; } </style> </head> <body> <div class="container"> <div>BEFORE</div> <div class="before">ABSOLUTE BEFORE</div> <div class="box">this is a test. this is a test. </div> </div> </body> </html>