@media only screen and (max-width: 600px) {
  .level2 {
    background: url(../images/AMR-BKG-mobile.jpg) no-repeat 50% 0 transparent;
  }
  .level3,
  .level4 {
    background: none;
  }
}
@media only screen and (min-width: 600px) {
  .level2 {
    background: url(../images/AMR-BKG-ipad.jpg) no-repeat 50% 0 transparent;
  }
  .level3,
  .level4 {
    background: url(../images/AMR-BKG-top.jpg) no-repeat 50% 0 transparent;
  }
}
@media only screen and (min-width: 960px) {
  .level2,
  .level3,
  .level4 {
    background: none;
  }
  .level2 #bgContainer,
  .level3 #bgContainer,
  .level4 #bgContainer {
    background: url(/developpement-durable/images/dd-bkg.jpg) no-repeat 50% 0 transparent;
    left: -518px;
    width: 1046px;
  }
}
.ie8 .level2,
.ie8 .level3,
.ie7 .level2,
.ie7 .level3,
.ie8 .level4,
.ie7 .level4 {
  background: url(/developpement-durable/images/dd-bkg.jpg) no-repeat 50% 0 transparent;
}