# File lib/wikicloth.rb, line 145
    def get_id_for(val)
      val.gsub!(/[^A-Za-z0-9_]+/,'')
      @idmap ||= {}
      @idmap[val] ||= 0
      @idmap[val] += 1
      @idmap[val] == 1 ? val : "#{val}-#{@idmap[val]}"
    end