title: jqplot format tooltip values
body: <p>I want to have a tooltip hover highlight thingy in jqplot. The problem is that I want it to give more detail then on the axes. So the formatter should be different. I can't get it to display the seconds to:</p>
  
  <p>There's a JS fidle <a href="http://jsfiddle.net/DWFTb/12/" rel="noreferrer" title="for tests">here</a>!</p>
  
  <p>I want the timestamp to display as hours:minutes:seconds, which would be format string '%H:%M:%S' or '%T' or '%X'. But how do I do that?</p>
  
  <pre><code>    highlighter: {
          show: true,
          sizeAdjust: 3,
          //useAxesFormatters: false,
          //tooltipFormatString: '%H:%M:%S',
          formatString: '&lt;table class="jqplot-highlighter"&gt;&lt;tr&gt;&lt;td&gt;tijd:&lt;/td&gt;&lt;td&gt;%s&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;snelheid:&lt;/td&gt;&lt;td&gt;%s&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;',
      },
  </code></pre>