var errorText1 = "<p>Please select your title.</p>";
var errorText2 = "<p>Please enter a valid postcode.</p>";
var errorText3 = "<p>Please enter your first name.</p>";
var errorText4 = "<p>Please enter your last name.</p>";
var errorText5 = "<p>Please enter a valid email address.</p>";
var errorText6 = "<p>Please enter your telephone number.</p>";
var errorText7 = "<p>Please enter address line 1.</p>";
var errorText9 = "<p>Please enter a city.</p>";
var errorText10 = "<p>Please enter a county.</p>";
var errorText11 = "<p>Please enter a country.</p>";
var errorText12 = "<p>Please enter a message.</p>";
var errorText13 = "<p>Please check the box to receive updates.</p>";


function RegisterForUpdates() 
{      
    //check mandatory fields
    var firstnameValid = ValidateFirstName();
    var lastnameValid = ValidateLastName();
    var emailValid = ValidateEmail();
    var updatesValid = ValidateUpdatesCheckbox();
    
    if(firstnameValid == false || lastnameValid == false || emailValid == false || updatesValid == false)
    {
        return false;
    }   
        
    var sendNews;
    if(document.getElementById('tickbox').checked == true)
    {
        sendNews = "1"; //"Yes";
    }
    else
    {
        sendNews = "0"; //"No";
    }

    xmlhttpPost_Register("/PageTemplates/FormProcessing.aspx?" +
                "FormType=" + escape("NewsletterSignup") +
                "&Title=" + escape(document.getElementById('ddTitle').value) +
                "&FirstName=" + escape(document.getElementById('firstname').value) +
                "&LastName=" + escape(document.getElementById('secondname').value) +
                "&TelephoneNumber=" + escape(document.getElementById('telephone').value) +
                "&Email=" + escape(document.getElementById('email').value) +
                "&SendNewsAndUpdates=" + escape(sendNews));
      
    return false;
}

function xmlhttpPost_Register(strURL) 
{
    var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('GET', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {
        if (self.xmlHttpReq.readyState == 4) {
            updatepage_Register(self.xmlHttpReq.responseText);
        }
    }
    self.xmlHttpReq.send(null);
}


function updatepage_Register(str)
{
    window.location = str;
}

function ValidateFirstName()
{
    if (document.getElementById('firstname').value != "")
    {
        document.getElementById('ErrFirstName').style.display = "none";
        document.getElementById('ErrFirstName').innerHTML = "";
	    return true;
    }
    else
    {
        document.getElementById('ErrFirstName').style.display = "";
        document.getElementById('ErrFirstName').innerHTML = errorText3;
        return false;
    }
}

function ValidateLastName()
{
    if (document.getElementById('secondname').value != "")
    {
        document.getElementById('ErrLastName').style.display = "none";
        document.getElementById('ErrLastName').innerHTML = "";
	    return true;
    }
    else
    {
        document.getElementById('ErrLastName').style.display = "";
        document.getElementById('ErrLastName').innerHTML = errorText4;
        return false;
    }
}

function ValidateEmail()
{
    var email = document.getElementById('email').value;
    if ( (email.indexOf("@") > 1) && //  must contain @, and it must not be the first character
          (email.lastIndexOf(".") > email.indexOf("@")) &&  // last dot must be after the @
          (email.indexOf("@") != email.length) &&  // @ must not be the last character
          (email.indexOf("..") < 0) && // two periods in a row is not valid
          (email.indexOf(".") != email.length) &&  // . must not be the last character
          (AllValidEmailChars(email)) ) // all characters must be valid
    {
        document.getElementById('ErrEmail').style.display = "none";
        document.getElementById('ErrEmail').innerHTML = "";
	    return true;
    }
    else
    {
        //if(email == "")
        //{
        //    document.getElementById('ErrEmail').style.display = "none";
        //    document.getElementById('ErrEmail').innerHTML = "";
	    //    return true;
        //}
        //else
        //{
            document.getElementById('ErrEmail').style.display = "";
            document.getElementById('ErrEmail').innerHTML = errorText5;
            return false;
        //}
    }
}

function ValidateTelephone()
{
    if (document.getElementById('telephone').value != "" )
    {
        document.getElementById('ErrTel').style.display = "none";
        document.getElementById('ErrTel').innerHTML = "";
	    return true;
    }
    else
    {
        document.getElementById('ErrTel').style.display = "";
        document.getElementById('ErrTel').innerHTML = errorText6;
        return false;
    }
}

function ValidateUpdatesCheckbox() 
{
    if (document.getElementById('tickbox').checked == true) 
    {
        document.getElementById('ErrUpdates').style.display = "none";
        document.getElementById('ErrUpdates').innerHTML = "";
        return true;
    }
    else 
    {
        document.getElementById('ErrUpdates').style.display = "";
        document.getElementById('ErrUpdates').innerHTML = errorText13;
        return false;
    }
}

function AllValidEmailChars(email)
{
    var isValid = true;
    var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
    for (var i=0; i < email.length; i++) 
    {
        var letter = email.charAt(i).toLowerCase();
        if (validchars.indexOf(letter) != -1)
        {
          continue;
        }
        else
        {
            isValid = false;
            break;
        }
    }
    return isValid;
}