title: Why doesn't height: 100% work to expand divs to the screen height?
body: <p>I want the carousel DIV (s7) to expand to the height of the entire screen. I haven't an idea as to why it's not succeeding. To see the page you can go <a href="http://roseannebarr.tumblr.com" rel="noreferrer">here</a>.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>body {
    height: 100%;
    color: #FFF;
    font: normal 28px/28px'HelveticaWorldRegular', Helvetica, Arial, Sans-Serif;
    background: #222 url('') no-repeat center center fixed;
    overflow: hidden;
    background-size: cover;
    margin: 0;
    padding: 0;
  }
  .holder {
    height: 100%;
    margin: auto;
  }
  #s7 {
    width: 100%;
    height: 100%: margin: auto;
    overflow: hidden;
    z-index: 1;
  }
  #s7 #posts {
    width: 100%;
    min-height: 100%;
    color: #FFF;
    font-size: 13px;
    text-align: left;
    line-height: 16px;
    margin: auto;
    background: #AAA;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="nav"&gt;
    &lt;a class="prev2" id="prev2" href="#"&gt;
      &lt;img src="http://static.tumblr.com/ux4v5bf/ASslogxz4/left.png"&gt;
    &lt;/a&gt;
    &lt;a class="next2" id="next2" href="#"&gt;
      &lt;img src="http://static.tumblr.com/ux4v5bf/swslogxmg/right.png"&gt;
    &lt;/a&gt;
  &lt;/div&gt;
  
  &lt;div class="holder"&gt;
    &lt;tr&gt;
      &lt;td&gt;
        &lt;div id="s7"&gt;
          {block:Posts}
          &lt;div id="posts"&gt;</code></pre>
  </div>
  </div>
  </p>