The JavaScript of each website appears to be quite small and similarly sized. They are all minimized, but have reordered things around a bit.
First we have to know that the Wayback Machine adds some stuff before and after the original code. The actual code there starts at:
ap={fg:['MSXML2.XMLHTTP
and ends in:
ck++;};return fu;};
We can use a JavaScript beautifier such as beautifier.io/ to be abe to better read the code.
It is worth noting that there's a lot of <script> tags inline as well, which seem to matter.
Further analysis would be needed.