THtmlArea class file.

• version: $Id: THtmlArea.php 1495 2006-11-15 23:54:00Z wei $
• license: http://www.pradosoft.com/license/
• copyright: Copyright © 2006 PradoSoft
• link: http://www.pradosoft.com/
• author: Wei Zhuo <weizhuo[at]gmail[dot]com>