尝试捕获与jQuery Ajax请求

尝试类似这样的方法，在该函数中，无论发生什么情况，一旦完成，您就可以对每个请求运行。这应该可以解决问题：

// Store a global var so we can all play nicely.// Make sure this gets reset to false right before your AJAX call,// or it will only work once!var weHaveSuccess = false;$.ajax({    type: "POST",    url: someurl,    contentType : "text/xml",    data: somedata,    username: user,    password: pass,    success: function(data,status,xhr){        alert("Hurrah!");        weHaveSuccess = true;    },    error: function(xhr, status, error){        alert("Error!" + xhr.status);    },    complete: function(){        if(!weHaveSuccess){  alert('Your username/password seems to be incorrect!');        }    },    dataType: "xml"});