var tt;
function dimention(){
var larg = (document.body.clientWidth);
var haut = (document.body.clientHeight);

if (larg>1152){
tt=(larg/2)-585;

document.getElementById("test").style.left=tt+"px";
document.getElementById("photo").style.left=tt+"px";
document.getElementById("banierre").style.left=tt+"px";
}

}