Same application different URLs.

Within my company we have two enviroments one for qa and one for development.

We end up testing the same applications in each enviroment and would like to share testing scripts... however we can't seem to get the handed off scripts to work.

Here is the scenario.
1) test script is written to login to https://application.dev.com & then do some minor addational functions - this works.
2) the same script is provided to qa
3) the test scriptis updated to have https://application.qa.com as the starting URL
4) the script fails to run in their enviroment

Is there anyway to share scripts that require simply changes or is this not possible?

Thanks,