.pageContent {
  background-image: url(images/bannerFlower.png);
}

.article img, .scrollImg {
  display: block;
  margin-left: auto;
  margin-right: auto;
  text-align: center; /* non-standard: needed for IE */

  padding: 10px; 
  background-color: white;
  border: 1px solid darkgray;
}