pass value/variable from fancybox iframe to parent

Question

I'am trying to pass a variable/ value from the fancybox iframe to the parent window without success.

Fancybox is launched from a link with

   class="fancybox fancybox.iframe"

My code in the fancybox.iframe is:

$(document).ready(function(){
   $('.insert_single').click(function(){
    var test =  $('.members_body').find('{row.U_USERNAME}');
    setTimeout(function(){ parent.$.fancybox.close();},300);return true;

   });
});

Where '{row.U_USERNAME}' is the username to find in the iframe.

Then, in the parent there's the following code:

 $(document).ready(function(){
 $('.fancybox').fancybox(

  {
openEffect:'fade',
openSpeed:500,


    afterClose: function(){
    alert($(".fancybox-iframe").contents().find(test)); 
    $('#form input[name=username]').val()(test);return false;
    }
}                   

  );
 });

But when the fancybox is closed, there's no alert showing up with the variable "test", nor the variable is showing up as a value or as a text in the input field of the form.

I've read and tried various solutions found here on stackoverflow without success.

Thanks in advance for helping

EDIT

Here's an Example

Answer 1

When the fancybox is closed the iframe is removed from the document. So you must use beforeClose event instead of afterClose

$(document).ready(function() {
    $('a.fancybox').fancybox({
        openEffect:'fade',
        openSpeed:500,
        beforeClose: function() {
            // working
            var $iframe = $('.fancybox-iframe');
            alert($('input', $iframe.contents()).val());
        },
        afterClose: function() {
            // not working
            var $iframe = $('.fancybox-iframe');
            alert($('input', $iframe.contents()).val());
        }
    });
});

JSFiddle: http://jsfiddle.net/NXY7Y/1/

EDIT:

I edited your jsfiddle (http://jsfiddle.net/NXY7Y/9/). Update is in this link http://jsfiddle.net/NXY7Y/13/

Main page javscript:

$(document).ready(function() {
    $('a.fancybox').fancybox({
        openEffect:'fade',
        openSpeed:500//,
        //beforeClose: function() {
        //    // working
        //    var $iframe = $('.fancybox-iframe');
        //    alert($('input', $iframe.contents()).val());
        //},
        //afterClose: function() {
        //    // not working
        //    var $iframe = $('.fancybox-iframe');
        //    alert($('input', $iframe.contents()).val());
        //}
    });
});

function setSelectedUser(userText) {
    $('#username').val(userText);
}

No need to use afterClose or beforeClose events. Just access the parent function setSelectedUser from the iframe on link click event like this:

$(document).ready(function() {
    $('a.insert_single').click(function() {
        parent.setSelectedUser($(this).text());
        parent.$.fancybox.close();
    });
});