#conteneur #alpha{
	position: absolute;
	left: 0;
	top: 0;
	width : 470px;
	height : 260px;
	background: url(../media/images/68-voeuxbis_470_260.jpg) no-repeat top left;
	/*background-color : yellow;*/
	-moz-opacity: 0.45; 
	opacity: 0.45;
	filter:alpha(opacity=45); 
}