What information is required in a good script?
except the lines of the characters, is the background of the characters required..
what else?

Perhaps this site can help you.

Are you trying to write a script for a play or for a screenplay? That could make a difference.

Good luck, and welcome to Answerpool!

Wow!
thanks...
ive learnt a lot...on scripts for movies.
ive never thought that it woyld be that complicated
what if im writng a play or on stage drama?

This site looks extremely useful. It gives some information about the differences between writing for theatre and film, and includes examples of manuscripts.

There are also books out there about this topic. If you're interested, go to Amazon.com and do a search for "playwriting," "write a play" or "writing a play".