.bac {
	background-attachment: fixed;
	background-image: url(ali_bsc.gif);
	background-repeat: no-repeat;
	background-position: center top;
	width: 758px
	height: 448px
}
.td_ba {
	background-attachment: fixed;
	background-image: url(katha_bac.gif);
	background-repeat: no-repeat;
	background-position: left top;
	height:155px
	width: 114px
	
}