Minimal TinyMCE Setup

gistfile1.html

<script src='path-to-tinymce-folder/tiny_mce.js'></script>

<textarea id='textArea1' style='width:100%'>
  <p><h2>TinyMCE is so easy to setup!</h2></p>
</textarea>

<script>
  tinyMCE.init({
    mode: 'exact',  // converts elements of the specified names as listed in the elements option into the rich text editor
    elements: 'textArea1'
  });
</script>