Initialize a textarea to be a TinyMCE text editor.
<script src="//tinymce.cachefly.net/4.0/tinymce.min.js"></script>
<script type="text/javascript">
tinymce.init({
selector: "textarea#txtBody1",
plugins: "spellchecker image textcolor autolink link media code",
content_css : "/optionalFile.css",
statusbar: false
});
</script>