def comments_error_display(content = nil)

      html = ''

      if content.errors.any?
        html = "<div id='error-explanation'>
  			<h2>Invalid:</h2><ul>"
        content.errors.full_messages.each do |msg|
          html += "<li>#{msg}</li>"
        end
        html += "</ul>
  			</div>"
      end

      html
    end
def comments_error_display(content = nil)

      html = ''

      if content.errors.any?
        html = "<div id='error-explanation'>
  			<h2>Invalid:</h2><ul>"
        content.errors.full_messages.each do |msg|
          html += "<li>#{msg}</li>"
        end
        html += "</ul>
  			</div>"
      end

      html
    end
returns the html for the error display for the comments form
 Params:
 +content+:: is the Comment ActiveRecord object with the errors