BODY  { background: #cccccc (bg1.jpg) no-repeat fixed; margin: 0px auto }
#header     { background-color: #696969; float: left; width: 900px; height: auto }
#main-navi   { background-color: #696969; width: 900px; height: auto }
#footer  { background-color: #696969; width: 900px; height: auto }