* {
	margin : 0 ; padding : 0 ;
}
body {
	width: 100%;
    background:linear-gradient(#999900 20%,#ffffff 100%);
}
 #my_body {
	margin: 0 auto; width : 900px ;
    background-color :#ffffff;
	
}
 #my_navigation {
	float : left ; width : 150px ;
}
 #my_contents {
	float: left;
	width: 100%;
	margin-top: 0px;
	margin-left: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
    background-color :#ffffff;

}
 #my_navigation2 {
	float : left ; width : 150px ;
	background-color :#ffffff;

}
 #my_header {
    padding:0px 0px 0px 0px;
	width : 100% ; height : 350px;
	margin: 0 auto;
	background-color :#ffffff;
}
 #my_footer {
	width : 100% ; clear : both ;
}