.voileecran{position:absolute;width:100%;height:100%;}
.divpopup{text-align:center;top:200px;position:absolute;left:0px}

@media only screen and (max-width: 767px) {
	.divpopup{text-align:center;top:130px;position:absolute;left:0px}
	.divpopup img{width:100%}	
}