[jQuery - blockUI] Help centering block message or finding better Plugin(s)

[jQuery - blockUI] Help centering block message or finding better Plugin(s)

I started using jQuery BlockUI Plugin by Malsup:

I find it useful to simulate "synchronous" Ajax calls and wait for them to complete, while temporarily disabling the user interface(s).
I choose this plugin mainly because of its element-blocking functionality (not only window-blocking!).

Btw, i started to experience some message-centering problems, in particular when using in combination with jQuery-ui Tabs ... 
The issue is reported here:

Unfortunately, the author seems not to reply to issues, and the last updates on GitHub date back to 3 years ago  , so i'm here to ask for some help to fix the code, or maybe to find some better plugin.

I just found jQuery MSG, which seems to work fine, but it allows me to block only the entire window while my target is, often, a SPECIFIC element (a DIV, for example).


Thanks to anyone who would have time to read this!