Arrays and choose one

Hi!!

I am newbie on ruby and I have questions and troubles, can you help me
out?

This is the html and  the view
[code]

<select name="select" multiple size="3">
<option value="audi">Audi</option>
<option value="bmw">BMW</option>
<option value="dodge">Dodge</option>
<option value="nissan">Nissan</option>
<option value="renault">Renault</option>
</select>

[/code]

The idea is to choose only one and that one show another list box with
some results, for example:

I want an audi, I selected the audi and then another list box shows the
types of audi: sedan, coupe,.....

This the code I have:

[code]

  def type
      @audi=Array.new
      @audi=['audi 1','audi 2','audi 3','audi 4']

      @bmw=Array.new
      @bmw=['bmw 1','bmw 2','bmw 3','bmw 4']

      @dodge=Array.new
      @dodge=['dodge 1','dodge 2','dodge 3','dodge 4']

      @nissan=Array.new
      @nissan=['nissan 1','nissan 2','nissan 3','nissan 4']

      @renault=Array.new
      @renault=['renault 1','renault 2','renault 3','renault 4']

      @type=params[:select]
        option=@type
        case option
        when audi
          puts @audi
        when bmw
          puts @bmw
        when dodge
          puts @dodge
        when nissan
          puts @nissan
        when renault
          puts @renault
        end
  end

[/code]

This code is bad?, good?, something are missing.?
thanks for the help

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