body {
  background-color:#aaaaff;
}

.box{
  position:absolute;
  top:50%;
  left:50%;
  width:409px;
  height:306px;
  margin-top:-150px;
  margin-left:-200px;
}

.img{
  background-color:#0000a0;
  width:104px;
  height:104px;
  margin:-1px;
  float:left;
  border:2px solid #ffffff;
}

.img[class]{
  width:100px;
  height:100px;
}