div.col_gauche {
	float:left;
	width:347px;
	margin-left: 94px;
	margin-right: 47px;
	background-color:#29262b;
}

*html div.col_gauche {
	margin-left: 47px;
}

.col_centrale {
	float:right;
	width:347px;
	margin-right: 94px;
	background-color:#29262b;
}