* {
	margin : 0 ; padding : 0 ;
}
 body {
	width: 100%;
/*  background-color: #000000; */
/*    background: -webkit-gradient(linear, left bottom, left top, from(#990), to(#fff));*/ �@/* Safari,Google Chrome�p */  
/*    background:linear-gradient(#ffffff 20%,#999900 100%);*/
/*	background-image : url(../canvas3.jpg); */
/*	background-repeat: repeat-y; */
	background-position: center center;
}
#my_body {
	margin: 0 auto; width : 900px ;
}
 #my_navigation {
 	background-color: #ffffff;
	float : left ; width : 150px ;
}
 #my_contents {
	float: left;
	width: 900px;
    background-color: #ffffff;
	margin-top: -1px;
	margin-left: -1px;
	margin-right: -1px;
	margin-bottom: -1px;
}
 #my_header {
	width : 100% ; height : 350px;
}
 #my_footer {
	width : 100% ; clear : both ;
}