title: What does the question mark mean in this function?
body: <p>Here's the documentation for this plugin (There's only two functions.)
  <a href="http://tkyk.github.com/jquery-history-plugin/#documentation">http://tkyk.github.com/jquery-history-plugin/#documentation</a></p>
  
  <pre><code>$(document).ready(function() {
      function load(num) {
          $('#content').load(num +".html");
      }
  
      $.history.init(function(url) {
          load(url == "" ? "1" : url);
      });
  
      $('#ajax-links a').live('click', function(e) {
          var url = $(this).attr('href');
          url = url.replace(/^.*#/, '');
          $.history.load(url);
          return false;
      });
  });
  </code></pre>
  
  <p>Here's the html:</p>
  
  <pre><code>&lt;body&gt;
    &lt;h1&gt;jQuery History Plugin Ajax Sample&lt;/h1&gt;
    &lt;div id="ajax-links"&gt;
      &lt;ul&gt;
        &lt;li&gt;&lt;a href="#1"&gt;load 1.html&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a href="#2"&gt;load 2.html&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a href="#3"&gt;load 3.html&lt;/a&gt;&lt;/li&gt;
      &lt;/ul&gt;
      &lt;div id="content"&gt;&lt;/div&gt;
      &lt;hr /&gt;
    &lt;/div&gt;
    &lt;p&gt;[&lt;a href="../"&gt;All samples&lt;/a&gt;] [&lt;a href="http://github.com/tkyk/jquery-history-plugin"&gt;Project home&lt;/a&gt;]&lt;/p&gt;
  &lt;/body&gt;
  </code></pre>