SwatML for this demo:
<?xml version="1.0" standalone="no"?>
<!DOCTYPE swatml SYSTEM "http://swat.silverorange.com/swatml1.dtd">
<swatml>
<widget class="SwatForm" id="my_form">
<widget class="SwatFormField">
<property name="title">Visual Editor Text Area</property>
<widget class="SwatTextareaEditor" id="textarea_editor">
<property name="value"><![CDATA[
<h3>Hello, World!</h3>
This is a visual editor<br/>with a bit of predefined text.
]]></property>
</widget>
</widget>
<widget class="SwatFooterFormField">
<widget class="SwatButton" />
</widget>
</widget>
</swatml>