```coffeescript
# Copyright 2012 The Apache Software Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http:#www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# ## t5/core/select
#
# Provides a document event handler that triggers an update a zone when the value
# of a select element within the zone changes.
define ["./events", "./dom", "./zone"],

  (events, dom, zone) ->

        dom.onDocument "change", "select[data-update-zone]", ->

          containingZone = zone.findZone this

          containingZone and containingZone.trigger events.zone.refresh,
            url: @attr "data-update-url"
            parameters:
              "t:selectvalue": @value()
```

Tweak code for handling Ajax updates triggered by changing a Select
user
```coffeescript
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http:#www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# ## t5/core/select
#
# Provides a document event handler that triggers an update a zone when the value
# of a select element within the zone changes.
define ["./events", "./dom", "./zone"],

  (events, dom, zone) ->

    dom.onDocument "change", "select[data-update-zone]", ->

      containingZone = zone.findZone this

      if containingZone
        containingZone.trigger events.zone.refresh,
          url: @attr "data-update-url"
          parameters:
            "t:selectvalue": @value()

      return
    return
```
assistant