Is there a function I can use to ....

- Check if Sheet 1 L1 value is listed anywhere in Sheet 2 Col A. If true,
then return the corresponding value from Sheet 2 Col B into the corresponding
cell in Sheet 1 Col M.

Sheet 1:
A....K L M
1 Part 1
2 Part 2
3 Part 3 4/16/2009

Sheet 2:
A B
1 Part 3 4/16/2009
2 Part 4
3 Part 5 4/17/2009