There are many Flickr API Javascript libraries. This is mine.

# EXAMPLE

 // basic setup and initialization

 var args = {
    'key' : 'YER_FLICKR_APIKEY',	// required
    'secret' :'YER_FLICKR_APISECRET',
    'enable_logging' : true
 };

 var flickr = new info.aaronland.flickr.API(args);

 // set up a callback function for reverse geocoding

 _reverseGeocodeComplete = function(rsp){

    if (rsp.stat == 'fail'){
       alert("reverse geocoding failed: " + rsp.message);
       return;
    }

    if (rsp.places.total == 0){
       alert("reverse geocding found no results");
    }

    var name = rsp.places.place[0].name;
    var woeid = rsp.places.place[0].woeid;

    alert(name + "(WOE ID:" + woeid + ")");
 };

 // reverse geocode a point in San Francisco

 flickr.api_call('flickr.places.findByLatLon', {
    'lat':37.79470999999999,
    'lon': ,-122.40195,
    'jsoncallback': '_reverseGeocodeComplete'
 });

 // profit!