reqwest('path/to/html', function (resp) {
  qwery('#content').html(resp)
})

reqwest({
    url: 'path/to/html'
  , method: 'post'
  , data: { foo: 'bar', baz: 100 }
  , success: function (resp) {
      qwery('#content').html(resp)
    }
})