Sort Posts within catergory with link

Hi everyone,

here’s the issue im running into:

I have a bunch of categories and id like the user to have the option to sort the posts by date added and alphabetical order with hyperlinks.

example: Sort by Date Added | Alphabetically

The code ive used so far is as follows:

<?php if($_GET['sort'] == 'title') query_posts('orderby=title&order=ASC'); ?>

<?php if (have_posts()) : ?>

<a href="<?php echo str_replace(('?'.$_SERVER['QUERY_STRING']), '', $_SERVER['REQUEST_URI']).'/?sort=title'; ?>" class="alpha">Sort by Alphabetical Order</a>
<a href="<?php echo str_replace(('?'.$_SERVER['QUERY_STRING']), '', $_SERVER['REQUEST_URI']); ?>" class="date">Sort by Date Added</a>

<?php endif; ?>

The issue is when ordering the posts alphabetically, all the posts within the blog show up. Id like it to be constrained to the category it is in.

I have not setup any additional page templates as it would get quite tedious.

Id like to know how you could pass a query so that wordpress could recognize the category it is in and sort posts from there onwards.

Any help is much appreciated ??

thanks!