# File lib/merb-helpers/form/helpers.rb, line 436
  def error_messages_for(obj = nil, opts = {})
    current_form_context.error_messages_for(obj, opts[:error_class] || "error", 
      opts[:build_li] || "<li>%s</li>", 
      opts[:header] || "<h2>Form submission failed because of %s problem%s</h2>",
      opts.key?(:before) ? opts[:before] : true)
  end