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#!/usr/bin/env ruby

require "rubygems"
require "hpricot"
require "open-uri"

url = ARGV[0];
id  = url.match(/v=(.*)/)[1]
doc = Hpricot::parse(open(url))

(doc/'img.vimgSm').each { |img| puts img.attributes["src"] if img.attributes["src"] =~ /#{id}/ }