The link says
This box is horizontally centered by setting its right and left margin widths to "auto". This is the preferred way to accomplish horizontal centering with CSS, and works very well in most browsers with CSS2 support. Unfortunately, IE5/Win does not respond to this method - a shortcoming of that browser, not the technique.
The work-around is for IE5 which is long out of date and I don't expect many computers have it now. Do you know that many of your viewers are using very old computers? If not I suggest you ignore the work-around.
Carry on using the margin: auto method which needs a div width for it to work.
Or use width: 600px; left: 50%; margin-left: -300px; you need to set the width to suit your page but note that the margin-left is always half the div width.
http://www.wickham43.supanet.com/tut...eringdivs.html
Code downloaded to my PC will be deleted in due course.
WIN7; IE9, Firefox, Opera, Chrome and Safari for Windows; screen resolution usually 1366*768.
Also IE6 on W98 with 800*600 and IE8 on Vista 1440*900.