using ?id= with $.ajax

using ?id= with $.ajax


I am trying to convert my site http://ultimate-battle-online.com into
a web App and so far I have:
<script type="text/javascript">
    $(document).ready(function(){
        $('#main_content').load('cityhall.php');
        $('#loading').hide();
        $('a').click(function() {
            $("#main_content").slideUp();
            var replacement = $(this).attr("title");
            var content_show = $(this).attr("id");
            $.ajax({
                method: "get", url: replacement, data: content_show,
                beforeSend: function(){$("#loading").show("fast");},
                complete: function(){$("#loading").hide("fast");},
                success: function(html){ //so, if data is retrieved, store it in
html
                    $("#main_content").slideDown("slow"); //animation
                    $("#main_content").html(html); //show the html inside .content
div
                 }
            });
//Take contents of mini side and update info
on side panel
            $.ajax({
                method: "get", url: 'includes/side_mini.inc.php',
                success: function(html){$("#side_details").html(html);}
            });
//Take contents of mini side 2 and update info
on side panel
            $.ajax({
                method: "get", url: 'includes/side_mini2.inc.php',
                success: function(html){$("#activity").html(html);}
            });
        });
    });
</script>
For some reason it likes the regular links with out a get data which I
put in "id=123" form. How would I get it to basically do what
stats.php?id=1 would do in a regular PHP file? Also leaving the url as
"stats.php?id=1" does not load lol... figures... Any ideas?