jquery ajax: closes #2452. get() and post() weren't shifting all arguments correctly.

src/ajax.js

@@ -111,8 +111,9 @@ jQuery.each( "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess,ajaxSend".sp
 jQuery.extend({
 
 	get: function( url, data, callback, type ) {
-		// shift arguments if data argument was ommited
+		// shift arguments if data argument was omited
 		if ( jQuery.isFunction( data ) ) {
+			type = callback;
 			callback = data;
 			data = null;
 		}
@@ -135,7 +136,9 @@ jQuery.extend({
 	},
 
 	post: function( url, data, callback, type ) {
+		// shift arguments if data argument was omited
 		if ( jQuery.isFunction( data ) ) {
+			type = callback;
 			callback = data;
 			data = {};
 		}