menu div side by side to div
<p>There are many references to setting divs side by side, but none answers my question, and I've read many in my attempts to solve this problem.  </p>

<p>A "nav-body" div contains two other divs:  a menu div should be on the left side of the nav-body div, and a "content" div that should be horizontally in the middle of nav-body.  The menu div does sit on the left side of the nav-body div, but the content div always displays centered horizontally, but below the last menu item.  I want the menu and content div to sit side-by-side with the content div centered in the nav-body div. </p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-css lang-css prettyprint-override"><code>  #nav-body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #336699;
    display: inline-block;
    height: auto;
    width: 100%;
    vertical-align: top;
    overflow: hidden;
  }
  #menu {
    margin: 0;
    padding: 0;
    width: 12em;
    background-color: #336699;
    list-style-image: none;
    list-style-type: none;
    overflow: auto;
    position: relative;
    display: inline-block;
    clear: both;
    float: left;
  }
  #menu li {
    font: 67.5%"Lucida Sans Unicode", "Bitstream Vera Sans", "Trebuchet Unicode MS", "Lucida Grande", Verdana, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  #menu a {
    background: #336699;
    border-bottom: 1px solid #336699;
    color: #ccc;
    display: block;
    margin: 0;
    padding: 8px 12px;
    text-decoration: none;
    font-weight: normal;
  }
  #menu a:hover {
    background: #2580a2 url("images/hover.gif") left center no-repeat;
    color: #fff;
    padding-bottom: 8px;
  }
  #content {
    font-size: medium;
    color: #336699;
    background-color: #FFF;
    display: inline-block;
    width: 50%;
    margin-right: 25%;
    margin-left: 25%;
    text-align: center;
    height: auto;
    vertical-align: 5%;
    overflow: auto;
    clear: both;
    float: left;
  }</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="nav-body"&gt;

  &lt;div id="menu"&gt;

    &lt;ul&gt;
      &lt;li class='active'&gt;&lt;a href='index.html'&gt;Home&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Calendar&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Announcements&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Join or Renew&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Seward Web Cams&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Links to Resources&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Weather&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Newsletters&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Snow Loads&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Boat Flooding Information&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Alaska Tide Links&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Official Time&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Officers&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Photo Pages&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Splicing Line&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Member Webpages&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;AK Highway Info/Webcams&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;WHSYC Racing Rules&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Harbor Maintenance Policy&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Float Plan Form&lt;/a&gt;
      &lt;/li&gt;
      &lt;li&gt;&lt;a href='#'&gt;Member Log-in&lt;/a&gt;
      &lt;/li&gt;
    &lt;/ul&gt;


  &lt;/div&gt;
  &lt;!--end menu div--&gt;


  &lt;div id="content"&gt;
    &lt;img src="PortAudrey.jpg" width="640" height="480"&gt;
    &lt;p&gt;Beautiful Port Audrey in southern Prince William Sound&lt;/p&gt;



  &lt;/div&gt;
  &lt;!--end content div--&gt;

&lt;/div&gt;
&lt;!--end nav-body div--&gt;</code></pre>
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