I was looking at this answere jQuery how to close dialog from iframe within dialog?. I have the same situation i.e. a page that calls a jqueryui dialog in this way:
var message = '<div id="pickDialog"><iframe frameborder="0" src="/Anagrafica/Pick?where=TipoAnagrafica=\'P\'"></iframe></div>'
    $(message).dialog({
        modal: true,
        width: 'auto',
        title: 'Seleziona'
    });
In the Anagrafica page, when the user press a button I run another jqueryui dialog as follows
var message = '<div>Hai selezionato ' + value + '.</div><div>Confermi?</div>'
        $('<div></div>').html(message).dialog({
            modal: true,
            title: 'Conferma',
            buttons: {
                "Si": function () {
                    window.parent.setCodice(value);
                    $(this).dialog("close");
                    window.parent.closePick();
                },
                "No": function () {
                    $(this).dialog("close");
                }
            }
        });
Function closePick in main page is:
function closePick() {
    $('#pickDialog').dialog('close');
    return false;
}
This code works... but only first time! When I open the iframe id="pickDialog" the second time, when I press Si button the dialog doesn't close. The function closePick is executed and I haven't errore in Javascript console. What could it be?
 
    