title: lastModified() function returns current date and time
body: <p>My question is : why when I use "document.lastModified" on my web page, it returns me the current date and time, not the time when this page was last Modified... 
  Any ideas?
  Thanks in advance :)</p>
  
  <p>Actual code is :</p>
  
  <pre><code>&lt;script type="text/javascript"&gt; document.write("Page was last modified on: " + document.lastModified);&lt;/script&gt;
  </code></pre>