Rather than try to post the code for the anything, it is far better to just give us a link to the original source, or a test page with the code on it. Anyone who knows enough to make the code work, also knows how to extract it from a test page. I found the original code at http://Hypergurl.com/calculator.html.
The Online Mortgage Calculator does work, but it needed a little help. The source code was posted on a web page using a