.back1 {	background-image: url(buil.gif);	background-repeat: no-repeat;	background-position: left bottom;}.back2 {	background-color: #003354;	background-image: url(back_3.gif);	background-repeat: repeat-x;	background-position: top;}.back3 {	background-image: url(top2_r2_c1.gif);	background-repeat: repeat-y;	background-position: left;}