local function id_colons(obj) -- replace : characters in links and ids with unserscores obj:traverse_elements(function(el) local name = string.lower(obj:get_element_name(el)) if name == "a" then local href = obj:get_attribute(el, "href") if href and not href:match("[a-z]%://") then obj:set_attribute(el, "href", href:gsub(":", "_")) end end local id = obj:get_attribute( el , "id") if id then obj:set_attribute(el, "id", id:gsub(":", "_")) end -- local id = obj:get_attribute(el, "id") end) return obj end return id_colons