How to return something from ajax

Use a callback:

function something(callback){
 $.ajax({
        'url':'/some/url',
        'type':'GET',
        'data':{'some':'data'},
        'success': callback
   });
}

something(function (data) {
    data['id']; // use it here
})

See:

https://stackoverflow.com/questions/8187201/return-value-from-inside-of-ajax-function