[jQuery] how to blockUI for whole document from iframe

[jQuery] how to blockUI for whole document from iframe


Hello friends,
While using ajax , i am blocking the UI part using the
following jquery ,
$(document).ajaxStart(function(){
$().blockUI({message: '<img src="/images-system/
loading.gif" />'})}).
ajaxStop($.unblockUI);
I am using this inside the iframe. So, while ajax request ,
the iframe document only blocked.
But i want to block the whole document.
Please suggest some idea.
Thanks & Regards,
Balavignesh