scriptpath="/SideMenu5/";
THis is almost right, like ruth said, you need treasury in there too...the / in front of sidemenu5 says start at the root of the web directory so you need the treasury inbetween there. You are linking to the source code correctly in your page, but be forewarned, you are doing it using relative links...if you copy that link to the code into another page in another directory, it may not work. You may want to try doing it like this.
<SCRIPT src="/treasury/Sidemenu5/Milonic_src.js"></SCRIPT>
Becuse this will work ANYWHERE in your site because it will always look starting from the root all the way to the sidemenu5 directory.