Index: ajax.js
===================================================================
--- ajax.js	(revision 5595)
+++ ajax.js	(working copy)
@@ -330,7 +330,7 @@
 					// Watch for, and catch, XML document parse errors
 					try {
 						// process the data (runs the xml through httpData regardless of callback)
-						data = jQuery.httpData( xml, s.dataType );
+						data = jQuery.httpData( xml, s.dataType, s.dataFilter );
 					} catch(e) {
 						status = "parsererror";
 					}
@@ -454,7 +454,7 @@
 		return false;
 	},
 
-	httpData: function( r, type ) {
+	httpData: function( r, type, filter ) {
 		var ct = r.getResponseHeader("content-type"),
 			xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0,
 			data = xml ? r.responseXML : r.responseText;
@@ -462,6 +462,10 @@
 		if ( xml && data.documentElement.tagName == "parsererror" )
 			throw "parsererror";
 
+		// Allow a pre-filtering function to sanitize the response
+		if( filter )
+			data = filter( data, type );
+		
 		// If the type is "script", eval it in global context
 		if ( type == "script" )
 			jQuery.globalEval( data );