jQuery.ax = function(url, data, type, successfn, errorfn, async) { ???var contentType = "application/json; charset=utf-8"; ???if ((data == null || data == "" || typeof(data) == "undefined")) { ???????$.ajax()({ ???????????type: type, ???????????async: async, ???????????url: url, ???????????dataType: "json", ???????????beforeSend: function(request) { ???????????????request.setRequestHeader("Content-type", "application/json"); ???????????}, ???????????contentType: contentType, ???????????success: function(d) { ???????????????successfun(d) ???????????}, ???????????error: function(e) { ???????????????errorfn(e); ???????????} ???????}); ???} else { ???????$.ajax()({ ???????????type: type, ???????????async: async, ???????????url: url, ???????????data: JSON.stringify(data), ???????????dataType: "json", ???????????contentType: contentType, ???????????beforeSend: function(request) { ???????????????request.setRequestHeader("Content-type", "application/json"); ???????????}, ???????????success: function(d) { ???????????????successfun(d) ???????????}, ???????????error: function(e) { ???????????????errorfn(e); ???????????} ???????}); ???}}ajax
原文地址：http://www.cnblogs.com/aeolian/p/8031785.html