How to disable an eventhandler when another is getting called

I have two event listeners on one input field. One gets called on change and one when you click on an autocomplete dropdown from google. My problem is when you click on such a autocompletion both handlers get called and make the request to the google api.

I tried to bind the onchange event and unbind it when the google autocomplete ajax call get fired, but the onchange event is executed first. So it will not get unbinded.
So, is there any possibility to detect if the user made the input manually or via autosugesstion? I want to execute the "requestlocation" function only when the user makes a manually input and doesn't use the autocomplete dropdown.
I tried it with some other eventhandler like "focus-out", but without success.

This line makes the bind:

autoCompleteInput.on "change", requestlocation
 

This is the function which get called:

requestlocation = () ->
   address = autoCompleteInput.val()
   geocoder = new google.maps.Geocoder()
   geocoder.geocode
     address: address, (results, status) ->
       if status is google.maps.GeocoderStatus.OK
 
         if results[0].address_components.length > 1
           city = results[0].address_components[0].long_name
           country = results[0].address_components[results[0].address_components.length-1].long_name
           setHiddenFields results[0].geometry.location.lat(), results[0].geometry.location.lng(), city, country 
           autoCompleteInput.val(city+", "+country)
         else
           city = null
           country = results[0].address_components[0].long_name
           setHiddenFields results[0].geometry.location.lat(), results[0].geometry.location.lng(), city, country
           autoCompleteInput.val(country)
         setMarker new google.maps.LatLng(latInput.val(), lngInput.val())
       else
         console.log "Geocode was not successful for the following reason: " + status
 

This is the code where the autocomplete handler makes the request:

google.maps.event.addListener autocomplete, 'place_changed', ->
   autoCompleteInput.off "change", requestlocation
 
   place = autocomplete.getPlace()
 
   if !!place.geometry
     autoCompleteInput.attr "data-valid", "true"
     setMarker place.geometry.location
     address = place.address_components
     if address.length > 1
       setHiddenFields place.geometry.location.lat(), place.geometry.location.lng(), address[0].long_name, address[address.length-1].long_name
     else
       setHiddenFields place.geometry.location.lat(), place.geometry.location.lng(), null, address[0].long_name
   else
     autoCompleteInput.attr "data-valid", "false"
 
   autoCompleteInput.on "change", requestlocation
 

Thanks for any answers!

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