A better solution to the caching issues faced. Set jQuery's global Ajax parameter 'cache' to false, and also set the 'Cache-Control' header to 'no-cache'

js/db_search.js

@@ -16,13 +16,11 @@
 $(document).ready(function() {
 
     /**
-     * Set a parameter for all Ajax queries made on this page.  Append a random
-     * number to tell server that each Ajax request is a new one
+     * Set a parameter for all Ajax queries made on this page.  Don't let the
+     * web server serve cached pages
      */
     $.ajaxSetup({
-        data: {'random': function() {
-                return Math.random();
-        }}
+        cache: 'false'
     });
 
     /**