title: What is the meaning of using "days*24*60*60*1000" in cookie?
body: <p>What is the meaning of using <code>days</code> * <code>24</code> * <code>60</code> * <code>60</code> * <code>1000</code> in a cookie?</p>
  <p>I've seen it quite a lot and I don't understand what it means.</p>
  <p>I need to create a function that reads the cookie and puts the value in a text box while uploading the page.</p>
  <pre><code>&lt;body onload=&quot;readCookie()&quot;&gt;
  </code></pre>