function sendSomething(data) {
    $.get('/send.php', { foo: data },
        function(response) {
            var json = tryParseJSON(response)
            if(json) {
                log('json ok '+ Math.random())
                if(json.changed) {
                    current = json.name
                    refresh(json.name)
                }
                //if(json.is_link_added) {}
                updField(json, 'is_link_added')
                updField(json, 'name')
                updField(json, 'changed')
                updField(json, 'previous')
                updField(json, 'update_time')
                var tick = parseInt($('#tick').val()) + 1
                $('#tick').val(tick)

                log(json.update_time + ' ' + json.debug_msg)

                my_callback(json.data)
            } else {
                log('error ' + Math.random() + response)
            }
        }
    );
}


function my_callback( data ) {
    // i wanna do something with this data
    console.log(data)
}