# File lib/fusioncharts/exporter/save_helper.rb, line 63
  def self.generate_unique_filename(complete_file_path_without_ext,extension) 
       md5_str=""
       finished=false
       until finished
          md5 = Digest::MD5.new
          now = Time.now
          md5 << now.to_s
          md5 << String(now.usec)
          md5 << String(rand(0))
          md5 << String($$)
          #md5 << constant
          md5.hexdigest
          if(Fusioncharts::Exporter::Properties.FILESUFFIXFORMAT=="TIMESTAMP")
            md5_str = md5.to_s + "_" + Time.now.strftime("%m%d%Y%S").to_s 
          else 
            md5_str = md5.to_s + "_" + Array.new(9){rand 10}.join 
          end
          finished=!FileTest.exists?(complete_file_path_without_ext+md5_str+"."+extension)
      end
      return complete_file_path_without_ext+md5_str + "." + extension
    end