body,html { background: #cbcbc4 url(bg.jpg) bottom center no-repeat fixed; height: 100%; width: 100%; margin: 0px; padding: 0px; text-align: center; }
/*.main { margin: auto auto; width: 865px; height: 710px; }

.content { width: 863px; height: 637px; }*/
.main { width: 863px; height: 637px; padding: 0px; position: absolute; top: 50%; left: 50%; margin-left: -431px; margin-top: -313px; }