Index: src/ajax.js
===================================================================
--- src/ajax.js	(revision 5709)
+++ src/ajax.js	(working copy)
@@ -473,11 +473,11 @@
 			data = filter( data, type );
 
 		// If the type is "script", eval it in global context
-		if ( type == "script" )
+		if ( type == "script" || (ct && ct.indexOf("javascript") >= 0 ))
 			jQuery.globalEval( data );
 
 		// Get the JavaScript object, if JSON is used.
-		if ( type == "json" )
+		if ( type == "json"  || (ct && ct.indexOf("json") >= 0 ))
 			data = eval("(" + data + ")");
 
 		return data;