updates

ajax 聊天室,实现多人聊天,无刷新!

version 3.1
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- General
  > More user-friendly install script
  > Database table names should no longer conflict with existing tables in a database

- Instant Messaging
  > Full unicode support!

- Miscellaneous
  > Fixed numerous small bugs
  > Optimized script
  > New JSON PHP class
  > Minor memory leak fixed

version 3.0
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- General
  > Event-based system replaces sending buddylist to client each ping
  > Windows can be focused and defocused
  > Away message choices now have icons (for usability)
  > Completely replaced login/registration/forgot password screen
  > Toolbars have mouseover & mousedown images (for usability)
  > No more modal windows (preventing you from doing anything else while they were open -- Add Buddy, etc)

- User status
  > "Friends only" mode so only users on the user's buddylist can contact the user
  > "Invisible" mode lets the user look as if he/she is offline, but can still chat

- Chatrooms
  > Finally! Multi-user chatrooms.
  > Joined chatrooms appear as groups on the buddylist, with the chatroom users in that group

- Instant Messaging
  > Font sizes!
  > Font colors!
  > Emoticon list
  > Textbox is now multiline for better readability

- Detachable windows
  > Click the "detach" button (next to the "minimize" button) to popout the IM/chatroom to a separate window

- Bug fixes
  > Fixed auto-url linking
  > IM length limit of 1500 characters set (prevents enormous MySQL inserts)
  > No more login screen scrollbars issue in Safari
  > Minimize button on buddylist moved to less awkard location
  
version 2.53
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- Bug fixes
  > Non-stop away message sending issue when IMing yourself

version 2.52
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- Client/Server Communication
  > Modified XMLHTTPRequest object creation, should improve speed in the browser

version 2.51
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- Bug fixes
  > Fixed minor scrolling and focus issues in IM windows

version 2.5
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- Bug fixes
  > Won't send blank IM messages
  > Away message list no longer falls behind the buddylist
  > Fixed the "Remove User/Group window not appearing" issue
  > Links in IM sessions now open in a new window, instead of the same window
  > Various other small bugs and code cleanup

- Instant Messaging
  > IM sounds: sounds when a message is received or sent
  > Emoticons!
  > Ability to change the text font

version 2.02
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- Safari support!
- IM window focus issue fixed
- Dialog alert style bug fixed

version 2.01
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- Opera support!
- Enter key works on login form now

version 2.0
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- Better windowing system
  > Less clunky
  > Resizable windows
  > Smoother movement

- Updated buddy list
  > Removed drag/drop (didn't work well)
  > Groups!
  > Mouse over instead of selection
  > Window auto-resizes and moves when browser is resized

- Chat
  > History - shows past conversations with a person throughout the same session
  > Timestamp simplified

- General
  > Removed "menu"
  > Menu functions added to buddy list window

- Javascript
  > Replaced XML with JSON (bandwidth-saving/faster processing) 
  > Many, many bugfixes
  > Configurable options added
  > Fixed major issue of lagginess when IMing with many buddies

- PHP
  > Cleaned up source
  > XML replaced with JSON (see Javascript section)
  > Bugfixes

- MySQL
  > Buddylists stored using JSON (for groups)


version 1.0
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- Initial Release