def save(self, commit=False):
		instance = super(PageForm, self).save(commit=commit)

		# remove leading and trailing slashes
		url = str(instance.url).strip('/')
		instance.url = url

		# if no stylesheet for page, create one
		if instance.stylesheet == None:
			new_stylesheet = Stylesheet(title=instance.title, css=instance.css, last_updated_by=instance.last_updated_by)
			new_stylesheet.page = instance
			filepath = write_to_file(instance.title, instance, 'css')
			new_stylesheet.path = filepath
			new_stylesheet.save()
			instance.stylesheet = new_stylesheet
			instance.save()
		# update existing stylesheet
		else:
			update_stylesheet = Stylesheet.objects.get(pk=instance.stylesheet.pk)
			update_stylesheet.css = instance.css
			if instance.parent_page:
				filepath = write_to_file(instance.parent_page.title, instance, 'css')
			else:
				filepath = write_to_file(instance.title, instance, 'css')
			update_stylesheet.path = filepath
			update_stylesheet.save()
			# save all pages in the group
			instance.save()
			pages = instance.stylesheet.page_set.all()
			for page in pages:
				page.save()

		return instance
	def save(self, commit=True):
		instance = super(PageTemplateForm, self).save(commit=commit)
		write_to_file(instance.title, instance, 'html')

		return instance