.background {
	background-image: url(images/REF_www.gif);
	background-repeat: no-repeat;
	background-position: center top;
}
.background2 {
	background-image: url(images/logotop.gif);
	background-repeat: no-repeat;
	background-position: center top;
}
.background3 {
	background-image: url(http://www.cellitused.com/ref/images/logotop.gif);
	background-repeat: no-repeat;
	background-position: center top;
}