To align the div in center of the page we use width and margin css, but which not works in ie8 if page doesnt have DOC TYPE.
<div style="width: 100%"> <div style="width: 986px; margin: auto"> Center Content </div></div> In IE8, should add the following DOC TYPE before html tag
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html> 
