module CGI::TagMaker

def nOE_element(element, attributes = {})
  attributes={attributes=>nil} if attributes.kind_of?(String)
  s = "<#{element.upcase}".dup
  attributes.each do|name, value|
    next unless value
    s << " "
    s << CGI.escapeHTML(name.to_s)
    if value != true
      s << '="'
      s << CGI.escapeHTML(value.to_s)
      s << '"'
    end
  end
  s << ">"
end

def nOE_element_def(attributes = {}, &block)
  nOE_element(__callee__, attributes, &block)
end

def nO_element(element, attributes = {})
  s = nOE_element(element, attributes)
  if block_given?
    s << yield.to_s
    s << "</#{element.upcase}>"
  end
  s
end

def nO_element_def(attributes = {}, &block)
  nO_element(__callee__, attributes, &block)
end

def nn_element(element, attributes = {})
  s = nOE_element(element, attributes)
  if block_given?
    s << yield.to_s
  end
  s << "</#{element.upcase}>"
end

def nn_element_def(attributes = {}, &block)
  nn_element(__callee__, attributes, &block)
end