A few selected html transformations:

Simple subsitution of contents:
{{{
#!js
t = t.replace(/documentation/, "pure void");
}}}

A convenience method is provided for this, so the above code can be reduced to:
{{{
#!js
replace(/documentation/, "pure void");
}}}

Some sites don't provide a desciptive <title> but uses the company name for all pages. This can be fixed by extracting a resonable name from the html body and updating the <title> using the convenience function {{{gb.setDocumentTitle()}}}:
{{{
#!js
var m = t.match(/<h1><span id="item_name">(.+?)<\/span><\/h1>/i);
if (m)
	gb.setDocumentTitle(m[1]);
}}}

Some sites works best without Javascript at all because they do awful things like using Flash™ where a simple <img> would suffice. A simple convenience function fixes this:
{{{
#!js
gb.zapScriptElements();
}}}