the url always changes, just maybe not in the url bar.
use firebug or [F12] to find the real urls that bring in more results.
if you have permissions to fetch those urls, they should be nearly ready to go.
btw, you can use yahoo and google's APIs to search those services from any page using JSONp.
google's was called its "ajax search api" last time i used it, and yahoo has pipes and YQL are going strong.
(2013/5) HTML5:90.2% MOB:15.2% IE7:0.5% IE8:8.4% IE9:8.5% IE10:8.5%