html, body {
    height:100%;
	background: #cccccc; /* Old browsers */
	background: -moz-linear-gradient(top, #cccccc 0%, #ffffff 100%); /* FF3.6-15 */
	background: -webkit-linear-gradient(top, #cccccc 0%,#ffffff 100%); /* Chrome10-25,Safari5.1-6 */
	background: linear-gradient(to bottom, #cccccc 0%,#ffffff 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#cccccc', endColorstr='#ffffff',GradientType=0 ); /* IE6-9 */
}
div#wrap {
	min-height: 100%;
}
div#centered {
  margin-right: auto;
  margin-left: auto;
  width: 600px;
}