.chapeau {
	background-image: url(../images/thearto_1.jpg);
	background-repeat: no-repeat;
	background-position: left top;
}
.basbleu {
	background-attachment: fixed;
	background-image: url(../images/bastraitbleu.gif);
	background-repeat: repeat-x;
	background-position: left bottom;
	border: thin;

}