diff --git a/tools/convert_html_encoding.rb b/tools/convert_html_encoding.rb
index e55c867196..15adcffed1 100755
--- a/tools/convert_html_encoding.rb
+++ b/tools/convert_html_encoding.rb
@@ -4,8 +4,12 @@
 require 'nkf'
 require 'fileutils'
 
-src_dir = '../1.9.2.euc'
-dst_dir = '../1.9.2.utf8'
+if ARGV.size != 2
+  $stderr.puts 'Usage: convert_html.rb [src_dir] [dst_dir]'
+  exit
+end
+src_dir = ARGV[0]
+dst_dir = ARGV[1]
 
 if FileTest.exist?(dst_dir)
   puts dst_dir + ' already exist.'
diff --git a/tools/make_index.rb b/tools/make_index.rb
index 262a72f2df..5c6b645ce7 100755
--- a/tools/make_index.rb
+++ b/tools/make_index.rb
@@ -9,17 +9,27 @@
 require 'json'
 require 'yaml'
 
-html_dir = '../1.9.2'
+$SCRIPT_PATH = File.expand_path(File.dirname(__FILE__))
+
+if ARGV.empty?
+  $stderr.puts 'Usage: make_index.rb [html_dir]'
+  exit
+end
+html_dir = ARGV[0]
+if !FileTest.exist?(html_dir) || !FileTest.directory?(html_dir)
+  $stderr.puts 'Not found: ' + html_dir
+  exit
+end
 
 id = 1
 recs = []
-items = YAML.load_file('default_index.yml')
+items = YAML.load_file($SCRIPT_PATH + '/default_index.yml')
 
 Find.find(html_dir) do |file|
 
   if file !~ /\/(function|doc)\// && FileTest.file?(file) && File.extname(file) == '.html'
     html = File.read(file)
-    item = {:path=>file.gsub(/^\.\.\/1\.9\.2/, ''), :key=>''}
+    item = {:path=>file.gsub(/^.*1\.[0-9]\.[0-9]/, ''), :key=>''}
     id += 1
 
     # method
@@ -34,6 +44,7 @@
       item[:desc] = CGI.unescapeHTML($1.gsub(/<.*?>|"/, '').gsub(/\n/, ' '))
     end
 
+
     # class
     if html =~ %r{<title>(class|module|object) (.*?)</title>}
       item[:key] = CGI.unescapeHTML($2)