I looked at the source code of your site
http://laurencewallace.com/main.php
replace the line
------------------------------------------
callbackOnClose: function() {
$("a.iframe").empty;
}
---------------------------------------
by this one:
--------------------------------------------
'callbackOnClose': function() {
$("#fancy_content").empty();
}
-----------------------------------------
don't miss the quotation marks around 'callbackOnClose'
it should work now!