.parent {
	display: table;
  width: 100%;
  height: 100%;
  /*background: blue;*/
}
.child {
  display: table-cell;
  vertical-align: middle;
  /*background: green;*/
}
.content1 {
  float: right;
  margin-right: 20px;
  background: blue;
}
.content2 {
  float: left;
  margin-left: 20px;
}