XMLHttpRequestの使い方

■CardAuthToken.js

function CardAuthToken() {
  this.URL = "http://192.168.0.11:8080/CardAuthStub/token/request",
  this.TIMEOUT = 35e3
}
CardAuthToken.prototype = {
    createToken: function (merchantId, tokenGenerateKey, card, callBack) {
        var caller = this;
        try {
            var xhr = new XMLHttpRequest;

            xhr.onerror = function (e) {
                return callBack(caller.createErrObj("7001"))
            },
            xhr.ontimeout = function (e) {
                return callBack(caller.createErrObj("7001"))
            },
            xhr.onprogress = function () {},
            xhr.onload = function () {
                var obj;
                try {
                    obj = JSON.parse(xhr.responseText)
                } catch (obj) {
                    return callBack(caller.createErrObj("7001"))
                }
                return callBack(obj)
            },
            xhr.open("POST", this.URL, !0), xhr.setRequestHeader("Content-Type", "text/plain;charset=UTF-8"),
            xhr.timeout = this.TIMEOUT,
            xhr.send("merchant_id=" + encodeURIComponent(merchantId) +
                   "&token_generate_key=" + encodeURIComponent(tokenGenerateKey) +
                   "&card_number=" + encodeURIComponent(card.card_number) +
                   "&card_expire_year=" + encodeURIComponent(card.expire_year) +
                   "&card_expire_month=" + encodeURIComponent(card.expire_month) +
                   "&card_cvc=" + (void 0 === card.cvc? "": encodeURIComponent(card.cvc)) +
                   "&card_name=" + encodeURIComponent(card.name))
        } catch (e) {
            return r(caller.createErrObj("7001"))
        }
    },
    createErrObj: function (e) {
        return {result: e}
    }
};