def select_all!(*str_or_rx)
      results = str_or_rx.flatten.map { |v| select_by!(v, :multiple) }
      results.first
    end
def select_all!(*str_or_rx)
      results = str_or_rx.flatten.map { |v| select_by!(v, :multiple) }
      results.first
    end
Uses JavaScript to select all options whose text matches the given string.

 @param [String, Regexp] str_or_rx
 @raise [Watir::Exception::NoValueFoundException] if the value does not exist.