Strophe.js is a JavaScript library for speaking XMPP via BOSH (XEP 124
and 206) and WebSockets (draft-ietf-xmpp-websocket-00). It is
licensed under the MIT license, except for the files sha1.js, base64.js
and md5.js, which are licensed as public domain and BSD (see these files
for details).

It has been tested on Firefox, Firefox for Android, IE, Safari, Mobile Safari,
Chrome, Chrome for Android, Opera and the mobile Opera browser.

The homepage for Strophe is http://strophe.im/strophejs

The book Professional XMPP Programming with JavaScript and jQuery is
also available, which covers Strophe in detail in the context of web
applications. You can find more information at
http://professionalxmpp.com.