2
A short review;
You inlined the success function, I would use a properly named function outside of that block
This
$('#favoritepagesListBlock').empty();
$('#meetingsanddisclosuresBlock').empty();
$('#memberinstitutionBlock').empty();
$('#orderListBlock').empty();
can be
$('#favoritepagesListBlock,#meetingsanddisclosuresBlock,#...
2
First, make your code work. orderShowMore = true is assigning true to orderShowMore - the code in the block after this is inevitably going to get executed. Just go if(orderShowMore).
Second, don't use two variables named data - while scoping may make it unambiguous to the compiler, it's confusing to anyone reading your code. Also, consistent indenting goes ...
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