There is some server-side javascript code in html file I've dumpped from some web page
by using LWP::UserAgent, HTTP::Request and HTTP::Response... The problem is that I must
click on a button to initiate executing query (there is no link I could parse and call it)
directly... so there is probablly only one chance to use Javascript module (wrappers
around libjs) before I dig in libjs sources and try to find out how does mozilla