function Captcha(imageId,audioId, keyInputId) {
    this.captchaId = null;
    this.imageElementId = imageId;
    this.audioElementId = audioId;
    this.keyInputElementId = keyInputId;
    this.verified = false;
    this.audioSrc=null;
    this.serviceContext = "/pubajax/captchaService/v1.0/";
	this.validationKeyDelayMsg = "We're experiencing delays in processing validation keys. Please retry in 5 minutes.";
	this.errorImgId = "error_captcha_image";
}

Captcha.prototype.initCaptchaImage = function() {
	 var bindArgs = {
        url:        this.serviceContext + "?ts=" + escape(new Date()),
        method:     "get",
        load:       dojo.lang.hitch(this, this.init),
        error:      function(type, data, evt) {
                        alert("Problem initializing - please try again");
                    },
        mimetype:   "text/json"
    };

    dojo.io.bind(bindArgs);
}

Captcha.prototype.init = function(event, json) {
	this.captchaId = encodeURIComponent(json.imageId);
	//.replace("http","https")
	var captchaImageSrc = json.src;
	var isQA = /qa|qa2/i.test(window.location.hostname);
	var isSECURE = /https/i.test(window.location.protocol);
    if (isQA) {
		if (isSECURE) {
			captchaImageSrc = json.src.replace("http://qa.mlb.com/","https://qasecure.mlb.com/");
		}
    } else {
		if (isSECURE) {
			captchaImageSrc = json.src.replace("http://www.mlb.com/","https://secure.mlb.com/");
		}
    }
	document.getElementById(this.imageElementId).src = captchaImageSrc;
	if (json.imageId == this.errorImgId) {
		alert(this.validationKeyDelayMsg);
		Captcha.onImageError();
	}
}

Captcha.prototype.initCaptchaAudio = function() {
	 var bindArgs = {
        url:        this.serviceContext +"?captchaType=audio",
        method:     "get",
        load:       dojo.lang.hitch(this, this.play),
        error:      function(type, data, evt) {
                        alert("Problem initializing - please try again");
                    },
        mimetype:   "text/json"
    };
    dojo.io.bind(bindArgs);
}

Captcha.prototype.play = function(event, json) {
	this.captchaId = encodeURIComponent(json.audioId);
	this.audioSrc=json.srcAudio;
	var captchaAudioSrc = json.srcAudio
	var isQA = /qa|qa2/i.test(window.location.hostname);
	var isSECURE = /https/i.test(window.location.protocol);
    if (isQA) {
		if (isSECURE) {
			captchaAudioSrc = json.srcAudio.replace("http://qa.mlb.com/","https://qasecure.mlb.com/");
		}
    } else {
		if (isSECURE) {
			captchaAudioSrc = json.srcAudio.replace("http://www.mlb.com/","https://secure.mlb.com/");
		}
    }
    var embedCode = '<EMBED SRC=' + captchaAudioSrc + ' HIDDEN="true" AUTOSTART="true" >';
	document.getElementById(this.audioElementId).innerHTML = embedCode;
	if (json.audioId == this.errorAudioId) {
		alert(this.validationKeyDelayMsg);
		Captcha.onImageError();
	}
}

Captcha.prototype.verifyKey = function() {
    var inputKey = document.getElementById(this.keyInputElementId).value;
    var postURL = this.serviceContext + "?imageId=" + this.captchaId +
        "&key=" + inputKey;

    var bindArgs = {
        url:        postURL,
        sync:       true,
        method:     "post",
        load:       dojo.lang.hitch(this, this.verify),
        error:      function(type, data, evt) {
                        alert("Problem verifying - please try again");
                    },
        mimetype:   "text/json"
    };

    dojo.io.bind(bindArgs);

    return this.verified;
}

Captcha.prototype.verify = function(event, json) {
    if (json.keyValid) {
        this.verified = true;
    } else {
        this.verified = false;
    }
}

Captcha.onImageError = function(){};