Checkout Success page broken

Our checkout success page was working normally until we found out quite recently that it stopped displaying most of the page.
This was a few weeks after we placed some javascript code into the define pages editor for a popup to collect customer reviews.
After the code was implemented, the site was tested and the checkout success page worked.

Now, for some unknown reason, only the header and nav of our site is shown and the rest of the page is blank.
Here is the page: http://focalpointhardware.com/index.php?main_page=checkout_success
A screenshot is also attached for reference.

Any ideas as to how we can fix this ASAP?

Thanks!

What you're seeing is a "partial whitescreen", indicating that there's a debug-log waiting to let you know what the PHP-related issue is. Look in your /logs folder ...

Thanks, I checked the folder and I cant find any files that seem to relate to that issue...
Any other ideas?

Rachek107:

Thanks, I checked the folder and I cant find any files that seem to relate to that issue...
Any other ideas?
How about posting what's in the 10 most recent myDebug-xxxxx.log files? Perhaps your opinion of what "relates" may differ from ours?

Or maybe removing the code from the define page temporarily might help you narrow down the issue?