function checkEmail(email)
{	
    var pattern = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    var emailVal = $("#" + email).val();
    return pattern.test(emailVal);
}
$(function()
{
    $("#subForm input:image").click(function() {	
        
        // First, disable the form from submitting
        $('form#subForm').submit(function() { return false; });
        
        // Grab form action
        var formAction = $("form#subForm").attr("action");
        
        // Hacking together id for email field
        // Replace the xxxxx below:
        // If your form action were http://mysiteaddress.createsend.com/t/r/s/abcde/, then you'd enter "abcde" below
        var id = "khtuji";
        var emailId = id + "-" + id;
        
        // Validate email address with regex
        if (!checkEmail(emailId)) 
        {
            alert("Please enter a valid email address");
            return;
        }
        
        // Serialize form values to be submitted with POST
        var str = $("form#subForm").serialize();
        
        // Add form action to end of serialized data
        // CDATA is used to avoid validation errors
        //<![CDATA[
        var serialized = str + "&action=" + formAction;
        // ]]>
        
        // Submit the form via ajax
        $.ajax({
            url: "newsletter_proxy.php",
            type: "POST",
            data: serialized,
            success: function(data){
                // Server-side validation
                if (data.search(/invalid/i) != -1) {
                    alert('The email address you supplied is invalid and needs to be fixed before you can subscribe to this list.');
                }
                else
                {
                    $("#theForm").hide(); // If successfully submitted hides the form
                    $("#confirmation").slideDown("slow");  // Shows "Thanks for subscribing" div
                    $("#confirmation").tabIndex = -1;
                    $("#confirmation").focus(); // For screen reader accessibility
                }
            }
        });
    });
});