title: Execcommand formatblock headings in IE
body: <p>I want to format selected text to a heading, the way I am doing it works fine in Firefox and Google Chrome but it doesn't work in IE9, here is how I do it:</p>
  
  <pre><code>document.execCommand('formatBlock',false,'h1');
  </code></pre>
  
  <p>Does anyone know how to achieve the same task in Internet Explorer 9?</p>