/***  CSS Gradient  ***/
  /*  Chrome 1-9 and Safari 4-5.0  */

body {

  margin: 0;
  padding: 0;
  width:100%;
  height:100%;
  background-color: #888888;
}

#center {
  width: 120px;
  height: 120px;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-left: -60px;
  margin-top: -60px;
}