    def _repr_html_(self):
        url = self.get_app_root_url()
        da_id = self.session_id()
        comm = locate_jpd_comm(da_id, self, url[1:-1])
        external = self.add_external_link and '<hr/><a href="{url}" target="_new">Open in new window</a>'.format(url=url) or ""
        fb = 'frameborder="%i"' %(self.frame and 1 or 0)
        iframe = '''<div>
  <iframe src="%(url)s" width=%(width)s height=%(height)s %(frame)s></iframe>
  %(external)s for %(url)s
</div>''' %{'url' : url,
            #'local_url' : local_url,
            'da_id' : da_id,
            'external' : external,
            'width' : self.width,
            'height' : self.height,
            'frame': fb,}
        return iframe