#menu a.lecture{
	background-image: url(../images/menu_lecture_over_fr.jpg);
	background-repeat: no-repeat;
	background-position: top;
	width: 124px;
	height: 36px;
	margin: 0 0 0 0;
	padding: 0;
	position: relative;
	float: left;
}

#menu a.lecture:hover{
	background-image: url(../images/menu_lecture_over_fr.jpg);
	background-repeat: no-repeat;
	background-position: top;
	width: 124px;
	height: 36px;
	margin: 0 0 0 0;
	padding: 0;
	position: relative;
	float: left;
}

#image_section {
	background-image: url(../images/top_plan.jpg);
	background-repeat: no-repeat;
	background-position: top;
	width: 750px;
	height: 207px;
	margin: 15px 0 0 84px;
	padding: 0;
	position: relative;
	float: left;
}

#colonne_principale{
width:700px;
}
#colonne_principale img{
float:left;
}
a img{
border:none;
}