Don't access custom attribute as a property, fixes #810
Because doing so doesn't work anymore with IE9.
http://wiki.orbeon.com/forms/doc/contributor-guide/browser#TOC-Getting-the-value-of-custom-attributes-with-IE
Initially don't show placeholder if has focus, fixes #811
Don't send focus event for non-focusable XBL component, fixes #823
Fix #824 "Setfocus on XBL with mode="focus" focuses on nested control"
Fix #825 "Recaptcha doesn't work anymore"

- use XBL focus, binding and lhha modes
- fix search for input field
- remove hack for validity
- use jQuery
- improve CSS
- small clean-up
Fix fr:simple-captcha

- use XBL focus, binding and lhha modes
- fix namespace declaration
- improve CSS
FB: Edit Source: don't allow empty text