var xmlhttp = null;

function initXmlHttp(){
	if (window.XMLHttpRequest) {
		xmlhttp = new XMLHttpRequest()
	} else if (window.ActiveXObject) {
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
}

function validateRegistration() {
	$usr  = document.forms.f_registration.usr.value;
	$pwd = document.forms.f_registration.pwd.value;
	$pwdVerfiy = document.forms.f_registration.pwdVerify.value;

	if (!$usr=="")	{
		if(checkValidEmail($usr)){
			if (!$pwd=="") {
				if (checkPasswordLength($pwd)){
					if ($pwd==$pwdVerfiy){
						if (document.forms.f_registration.agb.checked){
							return usr_handler("typ=0&usr="+$usr+"&pwd="+$pwd);
						} else{
							alert("Please accept the Terms & Conditions by clicking here.");
						}
					} else{
						alert("The password you have entered does not match with that which you have registered.");
					}
				} else{
					alert("Your password must be between 6 and 16 characters.");
				}
			} else{
				alert("Please enter your password");
			}
		} else{
			alert("You entered an invalid email address. Please try again.");
		}
	} else{
		alert("Please enter your email address");
	}
	return false;
}

function validateConfirmation() {
	$pwd = document.forms.f_confirmation.pwd.value;
	$cid = document.forms.f_confirmation.cid.value;

	if (!$pwd=="")
	{
		usr_handler("typ=1&pwd=" + $pwd + "&cid=" + $cid);
	}
	else{
		alert ("Please enter your password");
	}
	
	return false;
}

function validateLogin(){
	$usr = document.forms.f_login.email.value;
	$pwd = document.forms.f_login.password.value;
	if ($usr == "")	{
		alert("Please enter your email address");
		return false;	
	}else if (!checkValidEmail($usr)){
		alert("You entered an invalid email address. Please try again.");
		return false;
	}else if ($pwd=="")	{
		alert("Please enter your password");
		return false;
	}else{
		usr_handler("typ=2&pwd=" + $pwd + "&usr=" + $usr);
		return false;
	}
}

function validateAccountUpdate(){
	$pwd		= document.forms.f_accountupdate.password.value;
	$pwdVerify	= document.forms.f_accountupdate.passwordVerify.value;
	
	if (!$pwd == ""){
		if ($pwd == $pwdVerify){
			if(checkPasswordLength($pwd)){
				return true;
			} else{
				alert("Your password must be between 6 and 16 characters.");
				return false;
			}
		} else{
			alert("The password you have entered does not match with that which you have registered.");
			return false;
		}
	}
}

function usr_handler($params){
	
	var params = $params;
	initXmlHttp();
	xmlhttp.open("POST","./user/handler.php",true);
	xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlhttp.setRequestHeader("Content-length", params.length);
	xmlhttp.setRequestHeader("Connection", "close");
	xmlhttp.onreadystatechange=catch_usr_handler;
	xmlhttp.send(params);
}

function catch_usr_handler(){
	if(xmlhttp.readyState==4){//data received
		var response = xmlhttp.responseText.replace(/^\s+|\s+$/g, '');//trim the response
		//alert(response);
		switch (response) {
			case "0.0":
					alert("The e-mail address you entered is already in use.  Please use another e-mail address or if you have forgotton your password please click on the link on the right.");
					break;
			case "0.1":
					window.location="http://www.glass.co.uk/user/register.php?done";
					break;
			case "0.2":
					alert("The e-mail address you entered is already in use.  Please use another e-mail address or if you have forgotton your password please click on the link on the right.");
					break;
			case "1.0": //error
					alert("An error occured during confirmation. Please try again.");
					break;
			case "1.1":
					window.location ="http://www.glass.co.uk/user/confirm.php?done";
					break;
			case "1.2":
					alert("The password you have entered does not match with that which you have registered. Please try again.");
					break;
			case "2.0":
					alert("Your login failed. Please check your email address and password and try again.");
					break;
			case "2.1":
					window.location.reload( false );
					break;
			case "2.2":
					alert("In order to log-in, you must review the email we sent you with your confirmation code.");
					break;
			case "2.3":
					window.location ="http://www.glass.co.uk/user/showroom.php?added&list=";
					break;
			case "2.4":
					window.location ="http://www.glass.co.uk/user/showroom.php?exists&list=";
					break;
			default:
					alert("Unexpected error");
					alert("response: " + response);
		}
	}
}


function validatePasswordChange(){

	$pwd = document.forms.f_pwforgotten.pwd.value;
	$pwdVerify = document.forms.f_pwforgotten.pwdVerify.value;

	if ($pwd == $pwdVerify){
		if(checkPasswordLength($pwd)){
			return true;
		} else{
			alert("Your password must be between 6 and 16 characters.");
			return false;
		}
	} else{
		alert("The password you have entered does not match with that which you have registered.");
		return false;
	}
}

function validatePasswordRequest(){

	$usr = document.forms.f_PWRequest.usr.value;

	if (checkValidEmail($usr)){
		return true;
	}
	else{
		alert("You entered an invalid email address. Please try again.");
		return false;
	}
}

function validateShrChangeName(){
	document.changeVehicleName.submit();
}

function validateShrDeleteEntry(){
	var answer = confirm ("")
	if (answer){
		$vehicleID	 = document.getElementById('vehicleID').value;
	usr_handler("typ=7&vehicleID="+$vehicleID);
	}

}


function checkValidEmail($emailAddr){
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test($emailAddr)){
		return true;
	}
	else{
		return false;
	}
}

function checkPasswordLength($password){
	if ($password.length >= 6 && $password.length <= 16){
		return true;
	} else{
		return false;	
	}
}