表单验证类 formhandler

　　FormHandler is a class which allows you to create dynamic forms with support for validating the field values.
　　With FormHandler you can:
　　- Generate a form
　　- Save and edit data from a MySQL, PostgreSQL or Access database
　　- Validate submitted values
　　- Can use templates
　　- The form HTML code is XHTML 1.0 compliant
　　- Possibility to change to style of the form
　　- Possibility to associate CSS styles or Javascript to the fields
　　- There can be generated special fields like date fields
　　- Support file uploads
　　- Possibility to generate an online text editor together with FCKeditor