Revisiting this thread because I have the Apple Cinema Display ( 1 year old approx ) and when I am editing photos they look good on my screen but when they go online they look a bit darker. how can I fix this?
You can't. You cannot control how others see your images on the web (or elsewhere). Yes, saving as sRGB is a good start but you have no control over others who may or may not be using color-managed applications (without, sRGB is meaningless), if or how they calibrate their displays, etc. The best you can do is control your images on your end using color management.
See:
sRGB urban legend & myths Part 2
In this 17-minute video, I'll discuss some more sRGB misinformation and cover:
When to use sRGB and what to expect on the web and mobile devices
How sRGB doesn't insure a visual match without color management, how to checkThe downsides of an all sRGB workflow sRGB's color gamut vs. "professional" output devices
The future of sRGB and wide gamut display technology
Photo print labs that demand sRGB for output
High resolution:
http://digitaldog.net/files/sRGBMythsPart2.mp4Low resolution on YouTube:
https://www.youtube.com/watch?v=WyvVUL1gWV