Thank-You Page Java Re-Direct Script

I have 2 Thank-You pages which re-direct by default to a specific external URL. I hired a programmer to write a javascript to override the default re-directs so that these Thank-You pages redirect to external URLS which I have specified. The script works but for some reason it has stopped working for 1 of the 2 Thank-You pages. This job will simply require you to take a look at the javascript which has been written and problem-solve why it has stopped working for one of the Thank-You pages and to fix this. This should take no more than 10 minutes for an experienced programmer.