title: Html5 header inside a div
body: <p>I have a modal popup which is wrapped inside a <code>DIV</code>.
  The modal is extensive enough to have a <code>H1</code>, a <code>body(DIV)</code> and a <code>FOOTER</code>. </p>
  
  <p>Is it correct to use <code>HEADER</code> and <code>FOOTER</code> elements in this way?</p>