title: use text-align smartly (if english dir=ltr if arabic dir=rtl)
body: <p>I have a community web site and I want that users write</p>
  
  <ul>
  <li>English posts with direction LTR / text-align: left) and</li>
  <li>Arabic posts with direction RTL / text-align: right.</li>
  </ul>
  
  <p>E.g. Google+ and twitter provides such an POST solution.</p>
  
  <p>I want add automatically direction  attribute to post when i read it from data base post load in rtl or ltr ! but i don't know how ?!</p>