Consider The Following case,
   <div id="d1" style="position:relative">
    <div id="d2" style="position:absolute">
     <div id="d3" style="position:absolute">
     </div>
    </div>
   </div>
By Referring the Link, 
 I Just confirmed that the <div id="d3"> will be relative to the <div id="d2">.
Even if we given position as absolute for <div id="d2">. 
Similarly what would it assumes when we place <div>s like below? (relative <div> inside a absolute <div>) 
   <div id="d1" style="position:relative">
    <div id="d2" style="position:absolute">
     <div id="d3" style="position:relative">
     </div>
    </div>
   </div>
can anybody explain this.?