WinJS check xhr request is cancelled or not

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Windows

Win8

WinJS

I have few xhr requests as follows,

var promise=[];
promise[0]=.WinJS.xhr({
        type: "POST",
        url: "some url",
        data: somedata,
        headers: { "Content-type": "application/json; charset=utf-8" },
        //  responseType: "json"
    }).then(function(success){}, function(error){});

promise[1]=.WinJS.xhr({
        type: "POST",
        url: "some url",
        data: somedata,
        headers: { "Content-type": "application/json; charset=utf-8" },
        //  responseType: "json"
    }).then(function(success){}, function(error){});
promise[2]=...
.
.
.

Now i will cancel few requests for e.g promise[0], promise[5],

promise[0].cancel();
promise[5].cancel();

Now on join I want to know which all requests are cancelled,

WinJS.Promise.join(promise).done(function(xhr){
//here i should be able to check which requests are cancelled
});