jQuery, apply .buttonset to an element that's not yet loaded - ajax

Question

I have the following code working nicely:
$field2.on("change", "#selector", function(){
$field2.load("./index.php?show-options=true", { value: $(this).val() }, function() {
$("#options").buttonset();
});
});
It loads the #options div and applies button to anchor tags within it.
Is there a way to declare
$("#options").buttonset();
BEFORE the #options div is loaded?
I looked through jQuery docs with no success, and also found this answer:
Apply jQuery UI widgets to ajax loaded elements
which I think might be on track, but haven't understood it fully nor managed to implement.
Help appreciated, thanks.

Answer 1

Doing the following:
$field2.on("change", "#selector", function(){
$field2.load("./index.php?show-options=true", { value: $(this).val() }, function() {
$field2.find("#options").buttonset();
});
});
Will make all option elements within $field2 into a button set (once the content has been updated).
Or alternatively you could make the button set on dom ready:
$(function() { $("#options").buttonset(); });
Update
jQuery selectors work on elements in the DOM (unless given a context), if the element is not in the DOM then unfortunately jQuery will not be able to affect it directly. If the load then call to buttonset is causing a FOUC (flash of unstyled content), you could try the following:
$field2.on("change", "#selector", function() {
$field2.empty();
$.get("./index.php?show-options=true", { value: $(this).val() }, function(data) {
var newContent = $(data);
$("#options", newContent).buttonset();
$field2.empty().append(newContent);
});
});