$.ajaxSetup({ success: function onSuccess(msg) { // add some functions to `msg` // then return to success method that defined in $.ajax msg.display = function(){ alert(msg.M_Prop); } return msg; } }); $.ajax({ success: function(newMsg){ // call new functions of newMsg object newMsg.display(); } });
success takes only function() and not something like success: function onSuccess(msg){...} or did I missed something?