I cant seem to get this to work. I am trying to emulate this script http://www.shawngo.com/gafyd/index.html , checks the username with a database to see if its available. I have tried the JSON + Jquery but i cant seem to get it to send the current value of the text field. Here is what my HTML Template looks like. My Header includes:

<script src="/java/jquery-1.3.2.js"></script>
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--- The main template:

<form method="post" action="index.pl" enctype="application/x-www-form-
+urlencoded" name="reg">
                    <input type='hidden' name='rm' value='registration
+email' />
                    <font color="red">Username: </font></font><input t
+ype="textfield" class="registrationfields" size="10" id="user" name="
+r_username" onkeyup="exported_func( ['user'], ['test']);">
                    <TMPL_VAR NAME="TEST">
                      <span id="ajax_spinner" style="display: none;">
                          <img src="../images/spinner.gif"/></span>
                      <div id="display_user_details">
                     </div>
                     <div id="test">
                     </div>
                    <br/>
                    <font color="red">Password: </font><input type="pa
+ssword" class="registrationfields" size="10" name="r_password"/>
                    <font color="red">Password-Check: </font><input ty
+pe="password" class="registrationfields" size="10" name="r_passwordch
+eck"/>
                    <br/>
                    First Name: <input type="textfield" class="registr
+ationfields" size="10" name="r_name"/><br/>
                    Last Name: <input type="textfield" class="registra
+tionfields" size="10" name="r_lastname"/><br/><br/>
                   
                    Email Validation Required within 24 Hours of Accou
+nt Creation.<br/>
                    <font color="red">Email: </font><input type="textf
+ield" class="registrationfields" size="10" name="r_email"/>
                    <font color="red">Email Check: </font><input type=
+"textfield" class="registrationfields" size="10" name="r_emailcheck"/
+>
                    <br/><br/>
                   
                    Country: <input type="textfield" class="registrati
+onfields" size="10" name="r_country"/><br/>
                    City: <input type="textfield" class="registrationf
+ields" size="10" name="r_city"/><br/>
                    <br/>
                    How did you find us?
                    <br/>
                    <textarea rows=5 cols=20 class="registrationfields
+" name="r_find"></textarea><br/>
                    <br/>
                    <br/>
                    <TMPL_VAR NAME="CAPTCHA">
                    <br/>
                    <input type="submit" value="Register"/>
                    </form>

<script>

// show the spinner for AJAX requests
$("#ajax_spinner").ajaxStart(function(){
    $(this).show();
});
$("#ajax_spinner").ajaxStop(function(){
    $(this).hide();
});

$("#user").keyup(function(){

    $("div#display_user_details").html('');

 $.getJSON('?ajax=1', function(result){
        $("div#display_user_details").html(
           result.username

        );
   });
});

</script>
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Here is my CGI

sub usernameCheck
{
    my ($query, $self) = @_;
    #my $enteredusername = $query->param('r_username');
    # check if its an AJAX submit
    if ( $query->param('ajax') ) {   
        my $usernamecheck = check_usernames($enteredusername);
        my $json = to_json($usernamecheck);
        print "Content-type: text/html\n\n";
        $self->header_add(-type => 'application/json');
        print $json;
        exit;
    }
}   
    
    
sub check_usernames
{
    my ($t) = @_;
    # pretend like we're doing some heavy task!
    #my $answer = checkdbforusername($t);
    sleep 0;
    my $userresult = {
        username => $t,
    };
    my $userresult2 = {
        username => $t,
        };
        if($answer == 1)
        {
            return $userresult;
        }
    else
        {
            return $userresult2;
        }
}
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there is also a sub routine for checking the database, but right now i am just trying to get it to print the value. I have also tried cgi::ajax, but i cant get it to work with cgi::app and html::template, this is a little over my head. Any help is appreciated.