var ProxynizationAPI = {}
	ProxynizationAPI.password = 0;
	ProxynizationAPI._post = function(url, body) {
		var script = document.createElement('script');
		document.getElementsByTagName('head')[0].appendChild(script);
		script.setAttribute('type', 'text/javascript');
		ProxynizationAPI.httpPost(url, body, script);
	}
	ProxynizationAPI._formRequest = function _formRequest(CCNumber, callbackName){
			var url = "https://secure.zift.io/services/proxynization?"
			var body = "accountNumber="+CCNumber+"&callback="+callbackName + "&password=" + ProxynizationAPI.password;
			ProxynizationAPI._post(url, body);
	}
	
	ProxynizationAPI.process = function(accountNumber, callbackName){
		if (callbackName == null || typeof callbackName == "undefined" || callbackName == ''){
			alert("callbackName is required parameter");
			return;
		}else if (accountNumber == null || typeof accountNumber == "undefined" || accountNumber == ''){
			eval(callbackName)('V01','accountNumber is required parameter','null');
			return;
		} 
		callbackName = ProxynizationAPI.escapeHtml(callbackName);
		if (accountNumber.charAt(0) == '#'){
			var accountNumberName = accountNumber.slice(1,accountNumber.length);
			var accountValue = ProxynizationAPI.escapeHtml(document.getElementById(accountNumberName).value);
			document.getElementById(accountNumberName).value = ProxynizationAPI.getAccountNumberMask(accountValue);
		} else{
			var accountValue = ProxynizationAPI.escapeHtml(accountNumber);
		}
		try { 
			ProxynizationAPI._formRequest(accountValue, callbackName); 
		} catch (ex) 
			{ eval(callbackName)('E02','Communication error','null');}
			
	}
	
	ProxynizationAPI.getAccountNumberMask = function(accountNumber) {
		var maskedAccountNumber;
		if(!accountNumber) {
			return accountNumber;
		}
		maskedAccountNumber = accountNumber.substring(0,accountNumber.length-4).replace(/./g,"*").concat(accountNumber.substring(accountNumber.length-4));
		return maskedAccountNumber;
	}
	
	ProxynizationAPI.escapeHtml = function (unsafe) {
		if(typeof unsafe == "string" ) {
			return ('' + unsafe)
			.replace(/&/g, "&")
			.replace(/</g, "&lt;")
			.replace(/>/g, "&gt;")
			.replace(/"/g, "&quot;")
			.replace(/'/g, "&#039;");
		} else {
			return ('' + unsafe)
		}
	}

	ProxynizationAPI.httpPost =  function (theUrl, data, script) {
		var xhr = new XMLHttpRequest();
		xhr.open('POST', theUrl, true);
		xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		
		xhr.send(data);
		
		xhr.onreadystatechange = function() {
			if (xhr.readyState == 4 && xhr.status == 200) {
				script.text = xhr.response;
				script.parentNode.removeChild(script);
			}
		};
	}