// - id: dialog DIV ID (optional; defaults to 'jqueryui_popup_dialog')
// - url, data, type: passed as the first three arguments to the $.ajax() call if an AJAX call is made, otherwise ignored.
// - dialog: an optional object of options passed to the $.dialog() call
// - id: dialog DIV ID (optional; defaults to 'jqueryui_popup_dialog')
// - url, data, type: passed as the first three arguments to the $.ajax() call if an AJAX call is made, otherwise ignored.
// - dialog: an optional object of options passed to the $.dialog() call