Kredor provides this free javascript that allows web sites to add a keyboard layout switch button to web pages independent of whether the computer is configured with native layouts or not. Users can also display the selected layout for reference while typing.
This is useful for search engines, forums, web-mail, dictionary sites, etc., chat sites, anywhere where users enter text.
Works with Internet Explorer 4+, Netscape 7.0, Mozilla/Gecko/Firefox 1.x.
Check it out here:
http://www.kredor.com/products/webkeyboards/
For what it is worth. Please share what you think, thanks.