title: header/footer/nav tags - what happens to these in IE7, IE8 and browsers than don't support HTML5?
body: <p>I am eager to start using Html5 in particular the <code>&lt;header&gt;/&lt;footer&gt;/&lt;article&gt;/&lt;nav&gt;</code> tags.</p>
  
  <p>What happens if the browser doesn't support these?</p>
  
  <p>Also I need to style these so: For Example: The <code>nav</code> has borders and margins etc. You know standard CSS stuff.</p>
  
  <p>So if I style them using the <code>nav</code> tag then IE7 &amp; IE8 etc are going to ignore this?</p>