#s1 {
	background-image: url(images/slides_images/ects_label.jpg);
}
#s2 {
	background-image: url(images/slides_images/iso.jpg);
}
#s3 {
	background-image: url(images/slides_images/ds_label.jpg);
}
#s4 {
	background-image: url(images/slides_images/hr.jpg);
}
#s5 {
	background-image: url(images/slides_images/do.jpg);
}
#s6 {
	background-image: url(images/slides_images/summer-school.jpg);
}
#s5 {
	background-image: url(labels/images/eche_slide.jpg);
}