// JavaScript Document

var xmlHttp;

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

function sendEmail() {
    
	var Name = document.getElementById("Name").value;
	var Surname = document.getElementById("Surname").value;
	var Email = document.getElementById("Email").value;
	
	if (Name == ""){
		alert("Form Error: Please submit your first name");
		document.getElementById("Name").focus();
		return false;
	}
	else if (Surname == "") {
		alert("Form Error: Please submit your surname");
		document.getElementById("Surname").focus();
		return false;
	}
	else if (checkemail(Email) == false) {
		alert("Form Error: Please submit a valid email address");
		document.getElementById("Email").focus();
		return false;
	}
	else {
	
	createXMLHttpRequest();
	
	document.getElementById("form-status").style.display = "none";
    
	var queryString = "sign-up.asp?Name=" + Name + "&Surname=" + Surname + "&Email=" + Email;
	
	//alert(queryString);
	
    xmlHttp.open("POST", queryString, true);
    xmlHttp.onreadystatechange = handleStateChange;
    xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");    
    xmlHttp.send(queryString);
	
	document.getElementById("form-sending").style.display = "block";
	
	}
}
    
function handleStateChange() {
    if(xmlHttp.readyState == 4) {
        if(xmlHttp.status == 200) {
            parseResults();
        }
    }
}

function parseResults() {
    var responseDiv = document.getElementById("server-response");
	document.getElementById("form-error").style.display = "block";
    if(responseDiv.hasChildNodes()) {
        responseDiv.removeChild(responseDiv.childNodes[0]);
		responseDiv.style.color = "#900";
    }
    
    var responseText = document.createTextNode(xmlHttp.responseText);
    responseDiv.appendChild(responseText);
	
	if (responseText.length == 6) {
		document.getElementById("form-error").style.display = "none";
		responseDiv.style.color = "#333";
		window.setTimeout('displayFinish()',2000);		
	}
}

function checkemail(str){
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
	if (filter.test(str))
		return true;
	else {
		return false;
	}
}

function get_check_value(input_id) {
	var c_value = "";
	for (var i=0; i < document.getElementById("styled_form").Interest_Area.length; i++) {
   		if (document.getElementById("styled_form").Interest_Area[i].checked) {
      		c_value = c_value + document.getElementById("styled_form").Interest_Area[i].value;
		}
   	}
	return c_value;
}

function ResetForm(xFormName){
    var frm = document.getElementById(xFormName);
    frm.reset();
}

function displayFinish(){
	document.getElementById("form-sending").style.display = "none";
	document.getElementById("form-status").style.display = "block";
	ResetForm("styled_form");
}