You need to modify the form tag in quicksearch.js to:
<form name='form1' target='iframe' method='post' action='http://www.idxcentral.com/snar/idxsearch_process.cfm?idxid=pdunham'>
where "iframe" is the name of the iframe (wrap page) where you wish to place the result.
PS: the iframe should be available in all pages that contain the Quick Search Option.
Let me know if that works out.