Hi Martin and Lex,

Thank you very much for all the help.

Here is  final script which help me to
1) query the website
2) download the wav file
3) extract the definition using Hpricot.

Li

####################################
# download wav file
# extract the definition

require "rubygems"
require "mechanize"

mech = WWW::Mechanize.new
mech.user_agent_alias = "Windows IE 6"
mech.get("http://www.ask.com/web?qsrc=2352&o=0&l=dir&dm=&q=dictionary")

form = nil

form = mech.page.forms.select {|form| form.has_field?("aj_text1")}.first

if(form == nil)
  abort "could not find form"
end

# query the website of word "filly"
form.aj_text1 = "filly"
new_page = mech.submit(form)

# download the wav file
wav_link = mech.page.links.select {|link| link.href =~/\.wav$/i}.first
puts "downloading #{wav_link.href}"
File.open(File.basename(wav_link.href),'w'){|f| 
f.puts(mech.get_file(wav_link.href))}

# extract the information
doc=Hpricot(new_page.body)
puts 
doc.search('div/span/table/tr/td').inner_html.gsub!(/<\/?[^>]*>/,"")

###screen output

>ruby mechanize7.rb
downloading http://media.ask.com/hm/ahd/pr/F0120600.wav
filly(n.)A young female horse.filly(n.)A lively, high-spirited girl or 
young woman.
>Exit code: 0




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