[jQuery] Dynamic form field changes aren't POSTed

[jQuery] Dynamic form field changes aren't POSTed


I'm using JQuery to, among other things, dynamically create and modify
form input elements in response to events. I've noticed though, that
whenever I do this, any newly created inputs or changes to existing
inputs don't make it through when the form is POSTed. Example:
$(function(){
    $("#someButton").click(function() {
        fieldCount = parseInt($("#fieldCount").val());
        $("#fieldCount").val(fieldCount + 1);
        .........
I can see the value of my fieldCount field changing when #someButton
is clicked, but when I submit the form, the value is what it was
originally.
Am I missing something?