case insensitive ls listing?

[Kamaraju Kusumanchi <kk288@cornell.edu>]

This is one of my long standing problems. Is there a way to make the 
listing of ls case insensitive?

for example if in a directory, I do

ls -someoption tem

it should show all the files such as

tem, Tem, tEm, TEm, TeM, TEM etc...

I could not find such an option in the default ls. Is there any enhance 
ls package which does this? or can the default ls be manifested to do this?

I can always do

ls [tT][eE][mM]

but that is too cumbersome to type and errorprone.

Any ideas are welcome
thanks
raju