Before merlyn screams homework ;-) I'd just like to point out a few things.

We are all willing to help when we can but in order to help we need to see the code: Post it! You will not only get a better quality of help, you will also get XP because we like code here especially if it does something in a neat and innovative way.

The other reason is that we are not here to do your work for you: If you have tried to crack a problem (although in this case there are several well documented ways of doing it if I remember correctly) before asking for help, this is fine, but just expecting us to do the work for you is false laziness and therefore a BAD THING!

Go and have a look around the Perlmonks FAQ, monastery guide and formatting tips as this will help you a lot.

Cheers, Elgon