Edit in JSFiddle

<div class="kartz_container">
<div class="kartz_box_static">
position: static</div>
<div class="kartz_box_relative">
relative position </div>
<div class="kartz_box_static">
position: static</div>
</div>

.kartz_container {
  position: relative;
  width: 400px;
  height: 100px;
  border: 1px solid SteelBlue;
  background-color:PowderBlue;
}
.kartz_box_static {
  width: 25%;
  height: 75%;
  margin: 2%;
  border: 1px solid OrangeRed;
  text-align: center;
  color: white;
  background-color:Red;
  display: inline-block;
}
.kartz_box_relative {
  width: 30%;
  height: 75%;
  margin: 2%;
  border: 1px solid SkyBlue;
  text-align: center;
  color: Gold;
  background-color:SlateBlue;
  display: inline-block;
  position: relative;
  top: 10%;
}