top/bottom box-shadow

gistfile1.css

body:before {
          content: "";
          position: fixed;
          top: -200px;
          left: 0;
          width: 100%;
          height: 200px;

          -webkit-box-shadow: 0px 0px 200px #FF00E6;
              -moz-box-shadow: 0px 0px 200px #FF00E6;
                         box-shadow: 0px 0px 200px #FF00E6;

          z-index: 100;
}

body:after {
content: "";
position: fixed;
bottom: -10px;
left: 0;
width: 100%;
height: 10px;

-webkit-box-shadow: 0px 0px 10px rgba(0,0,0,.8);
-moz-box-shadow: 0px 0px 10px rgba(0,0,0,.8);
box-shadow: 0px 0px 10px rgba(0,0,0,.8);

z-index: 100;
}