JQuery :: Binding A Submit() Event Handler To A Form That Was Loaded Using .load()?

When I load my page I am using the .load() function to load a section of HTML from another .html file into the current page, as follows:

$(document).ready(function() {
$('#login_js').load('_HTMLCodeLibrary.html #loginform');

On the very next line I am attempting to bind a submit event handler to the form:

$('#loginform').submit(function() {
$.post('member.php', $(this).serialize(), function(data, status) {
data = eval('(' + data + ')');
if (data.msg) {

[Code].....

The form is loading fine, but for some reason the submit() is not getting attached to the form. Therefore when I submit it is running member.php from the form "action". Ultimately, I want to be able to run member.php from $.post() so that I can tell member.php that JavaScript is enabled.