title: Google Analytics is counting less than half the number of visitors to website
body: <p>Google Analytics confuses me.</p>
  
  <p>I have always had a feeling that the Google Analytics visitor count for my eCommerce website was too low. Today I took a closer look.</p>
  
  <p>Last weekend there were about 8 orders (by different customers) on the website on Saturday and 9 on Sunday. Google Analytics however shows only 3 visitors on both Saturday and Sunday.</p>
  
  <p>The following familiar code snippet is in the main template of the site, which is called on every click.</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
      var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
      document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
      try {
          var pageTracker = _gat._getTracker("UA-xxxxxxx-1");
          pageTracker._trackPageview();
      } catch(err) {}
  &lt;/script&gt;
  </code></pre>
  
  <p>Yes, I am filtering (excluding) some fixed IP addresses from being counted, but only of my own sites.</p>
  
  <p>I know that visitors that have Javascript disabled cannot be counted, but I do not believe this explains it.</p>
  
  <p>What is going on, is this normal? Does anyone know why more than half of the visitors are not counted?</p>