Vertical Horizontal Center

vertical-horizontal-center.html

<div class="outer">
  <div class="middle">
    <div class="inner">
      <h1>The Content</h1>
      <p>Once upon a midnight dreary...</p>
    </div>
  </div>
</div>

<style>
.outer {
    display: table;
    position: absolute;
    height: 100%;
    width: 100%;
}

.middle {
    display: table-cell;
    vertical-align: middle;
}

.inner {
    margin-left: auto;
    margin-right: auto; 
    width: /*whatever width you want*/;
}

/* for IE less than 7 */
.outer {
    display: inline;
    top: 0;
}

.middle {
    display: inline;
    top: 50%;
    position: relative;
}

.inner {
    display: inline;
    top: -50%;
    position: relative;
}
</style>