body{
      margin:0;
      padding:165px 0 0 0;
     }
     div#header{
      position:absolute;
      top:0;
      left:0;
      width:100%;
      height:165px;
      z-index:1111;
     }
     @media screen{
      body>div#header{
       position: fixed;
      }
     }
     * html body{
      overflow:hidden;
     } 
     * html div#content{
      height:100%;
      z-index:10;
      position:fixed;
     }