title: Is CSS3 part of HTML5?
body: <p>Is CSS3 part of HTML5? 
  <br />It means if a browser supports CSS3, will  it support HTML5 elements too?</p>
  
  <p>I had tried HTML5 elements in IE9, They didnt work. 
  <br />But CSS3 properties( like <code>box-shadow</code>, <code>border-radius</code>) do work in IE9 fine by doing little changes in html file (By putting this tag <code>&lt;!DOCUMENT HTML&gt;</code>).</p>
  
  <p>So what do we have to say now?
  <br />Does IE9 supports HTML5 or It supports only CSS3 but not HTML5?</p>