重写Jquery的$.ajax方法

(function($){//备份jquery的ajax方法var _ajax=$.ajax;//重写jquery的ajax方法$.ajax=function(opt){//备份opt中error和success方法var fn = {error:function(XMLHttpRequest, textStatus, errorThrown){},success:function(data, textStatus){}}if(opt.error){fn.error=opt.error;}if(opt.success){fn.success=opt.success;}//扩展增强处理var _opt = $.extend(opt,{error:function(XMLHttpRequest, textStatus, errorThrown){//错误方法增强处理fn.error(XMLHttpRequest, textStatus, errorThrown);},success:function(data, textStatus){//成功回调方法增强处理fn.success(data, textStatus);}});_ajax(_opt);};})(jQuery);