.cs1 {
	background-attachment: fixed;
	background-image: url(images/about_1.jpg);
	background-repeat: no-repeat;
	background-position: left bottom;
}
.bgdi {
	background-attachment: fixed;
	background-image: url(images/about_5.jpg);
	background-repeat: no-repeat;
	background-position: left bottom;
}