Set image margin top and left to negative value
<!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"> img { position: absolute; top: 50%; left: 50%; margin-top: -96px; margin-left: -138px; height: 192px; width: 256px; } </style> </head> <body> <img src="w.jpg" width="256" height="192" alt="Photo"> </body> </html>