Version 1.1 (2001-06-15) Paul Johnston

• Renamed the add function to safe_add because add is a reserved word in ActionScript. Reported by Amanuel Workneh.
• All variables are now prefixed with var to make them local. Suggested by Richard Mitchell and Ian Richardson.
• The code now works in IE for Macintosh, thanks to Greg Holt and Andrew Kepert.
• The code now returns a lower-case hex string, like most MD5 functions. Thanks to Brian Lozier for noticing this.
• Code changed to use charCodeAt function instead of the dodgy sAscii variable. Thanks to Erik Johnson.
• Calls to Math.pow removed, now I've discovered the >>> operator.
• The code now works in Opera, because Peter Valach fixed a precedence problem.