I won't go out home today because I've been a little tired.

  def search_engine_check(ref_url)  
    engine = nil  
    engine = "google" if ref_url.index("http://www.google") == 0  
    engine = "google blogsearch" if ref_url.index("http://blogsearch.google") == 0  
    engine = "blogpeople" if ref_url.index("http://bst.blogpeople") == 0  
    engine = "yahoo" if ref_url.index("http://search.yahoo") == 0  
    engine = "yahoo blog" if ref_url.index("http://blog-search.yahoo.co.jp/") == 0  
    engine = "goo blog" if ref_url.index("http://blog.goo") == 0  
    engine = "Ask" if ref_url.index("http://ask.jp/") == 0  
    engine = "technorati" if ref_url.index("http://www.technorati") == 0  
    engine = "Live Search" if ref_url.index("http://search.live.com/") == 0  
    engine = "Matome" if ref_url.index("http://www.matome.jp/") == 0  
 
    if engine  
      url = ref_url + '&'  
      url.scan(/.*(MT|p|q|keyword|tag|search)(=|\/)(.+?)(&|\?)/) do |id, mark1, words, mark2|  
        word_array = words.split(/[　\+]+/).select{|word| word.size > 0}.uniq  
        ref_url = "#{engine}検索　[#{word_array.join(' ')}]"  
      end  
    end  
 
    return ref_url  
  end