[Building Sakai] implementing a "please wait" alert for a sakai tool

[George Pipkin]

Hi Everybody -

    I am trying to implement a "Please Wait..." alert for large 
Gradebooks.  I notice that SAK-3639 has
done something like this for msgcntr, and the JJira contains the 
following comment:

" NOTE: it can be used by any long loading process. Just place the 
property longPageLoad with either the full url or page name of the 
actual page to load."

I was wondering if anybody could enumerate on how I might make use of 
this in Gradebook.

                          - George Pipkin
                             U.Va.
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