>   I tried to download www.falconjet.com. After it 
finished, 
> I click index.html, the browser complains something not 
> defined. 

There are many, many errors ; most of them due to 
javascripting, such as:

// Top Nav Public
topnav1 = new RollOver(
"/images/home/nav1/hp_our_story_1.jpg",
"/images/home/nav1/hp_our_story_2.jpg");

Unfortunately, it is really hard to parse javascript code, 
and in this case, the result is bogus.

This is not really a bug, but an engine limit (the engine 
does not embed a "real" javascript analyzer)