An update to a method found on css-tricks.com to center items within each other without using table positioning. Source: http://css-tricks.com/centering-in-the-unknown/

unknownCentering-IE.css

.block:before {
  border: none;
  width: 0;
}

unknownCenting.css

/* This parent can be any width and height */
.block {
  text-align: center;
}
 
/* The ghost, nudged to maintain perfect centering */
.block:before {
  content: '';
  display: inline-block;
  height: 100%;
  vertical-align: middle;
  margin-right: -0.25em; /* Adjusts for spacing */
}

/* The element to be centered, can
   also be of any width and height */ 
.centered {
  display: inline-block;
  vertical-align: middle;
  width: 99%;
}