Fixed two FF JS warnings

src/ajax/ajax.js

@@ -457,7 +457,8 @@ jQuery.extend({
 		timeout: 0,
 		contentType: "application/x-www-form-urlencoded",
 		processData: true,
-		async: true
+		async: true,
+		data: null
 	},
 	
 	// Last-Modified header cache for next request

src/ajax/ajaxTest.js

@@ -70,7 +70,7 @@ test("load(String, Object, Function) - inject without callback", function() {
 test("load(String, Object, Function) - check scripts", function() {
 	expect(7);
 	stop();
-	testFoo = undefined;
+	var testFoo = undefined;
 	foobar = null;
 	var verifyEvaluation = function() {
 	  ok( foobar == "bar", 'Check if script src was evaluated after load' );