Jquery.load() Only Working Once (working With PHP)

I have an input text field with an add/submit button - it's purpose is to add tags to an article created in a CMS. Whenever a tag is entered

1) I am using a click listener on the submit button

2) and am calling Jquery.load() to perform some checks/validation and

4) add the tag to the database

5) then retrieve the new set of tags for that article and inject them into the DOM.

Therefore there are two click listerners in my header:

1 for the submit button:

$('#tags_submit').click(function() {
var tag = document.getElementById('tags_search').value;
var article_id = document.getElementById('a_id').value;
$('#tags_results').load(submit_link, {tags_search: tag, a_id: article_id});

[Code].....