I am using jQuery+JSON combination something like this:
test.php:
<script type="text/javascript" src="jsFile.js"></script>
<form action='_test.php' method='post' class='ajaxform'>
 <input type='text' name='txt' value='Test Text'>
 <input type='submit' value='submit'>
</form>
<div id='testDiv'></div>
_test.php:
<?php
      // Code here to deal with your form submitted data.
      $arr = array( 'testDiv' => 'Form is successfully submitted.' );
      echo json_encode( $arr );
?>
jsFile.js:
jQuery(document).ready(function(){
    jQuery('.ajaxform').submit( function() {
        $.ajax({
            url     : $(this).attr('action'),
            type    : $(this).attr('method'),
            dataType: 'json',
            data    : $(this).serialize(),
            success : function( data ) {
                        for(var id in data) {
                            jQuery('#' + id).html( data[id] );
                        }
                      }
        });
        return false;
    });
});
Now what i want is that when a successful form is submitted then without any page refresh a message should be displayed under the div testDiv. I was hoping that this script would help but when a form is submitted then the page goes to .../_test.php and displays the following -
{"testDiv":"Form is successfully submitted."}
Please help.Thanks in advanvce