title: Center align a div horizontally using default Twitter Bootstrap CSS
body: <p>I know how to center align a div horizontally in CSS. You need to make the width to something less than 100% and have auto margin on both left and right sides. I want to do this default styles of Twitter Bootstrap. I don't want to write additional CSS. Wondering whether it's possible to achieve using default style used in Twitter Bootstrap.</p>
  
  <p>To set width of the div, I am using <code>span*</code>. But <code>span*</code> is <code>float: left</code>. Is there any class, which can set the width of the div, but will not add <code>float: left</code>?</p>