created a hmenu directory on the web server and copied all the files from zip to this directory. So src files are within this folder.

The testhmenu.htm is also present in hmenu directory.

As you have requested I copied the files to my test system. pls check it. let me know if you need any info

Try this both urls.
http://test.gofileroom.com/hmenu/index.html - works ok
http://test.gofileroom.com/hmenu/testhmenu.htm - error

or give ur email id I can send all files so that u can review on your server.