function checkform()
{
	var errMsg = "";

	if (document.getElementById("firstName").value == "")
		errMsg += "Please enter your first name" + "\n";
		
	if (document.getElementById("lastName").value == "")
		errMsg += "Please enter your last name" + "\n";

	if (document.getElementById("streetNumber").value == "")
		errMsg += "Please enter your street number" + "\n";
		
	if (document.getElementById("streetName").value == "")
		errMsg += "Please enter your street name" + "\n";
		
	if (document.getElementById("postcode").value == "")
		errMsg += "Please enter your postcode" + "\n";
		
	if (document.getElementById("suburb").value == "")
		errMsg += "Please enter your town/suburb" + "\n";
		
	//if (document.getElementById("country").value == "")
	//	errMsg += "Please select your country" + "\n";
		
	if (!isInteger(document.getElementById("postcode").value))
		errMsg += "Please enter a valid postcode" + "\n";

	if ((document.getElementById("email").value == "") || (document.getElementById("email").value.indexOf("@") == -1) || (document.getElementById("email").value.indexOf(".") == -1))
		errMsg += "Please enter a valid email address" + "\n";
		
	if (document.getElementById("cemail").value != document.getElementById("email").value)
		errMsg += "Email address do not match" + "\n";
		
	if ((document.getElementById("friendName1").value == "") || (document.getElementById("friendName2").value == ""))
		errMsg += "Please enter your friend's full name" + "\n";
		
	if ((document.getElementById("friendEmail1").value == "") || (document.getElementById("friendEmail1").value.indexOf("@") == -1) || (document.getElementById("friendEmail1").value.indexOf(".") == -1) || (document.getElementById("friendEmail2").value == "") || (document.getElementById("friendEmail2").value.indexOf("@") == -1) || (document.getElementById("friendEmail2").value.indexOf(".") == -1))
		errMsg += "Please enter your friend's email address" + "\n";
		
	//if (document.getElementById("OlayProductYes").checked == false & document.getElementById("OlayProductNo").checked == false)
		//errMsg += "Please choose if you currently use an Olay product" + "\n";
	
	if (document.getElementById("terms").checked == false)
		errMsg += "Please read and accept the terms and conditions" + "\n";

	if (errMsg != "")
	{
		alert (errMsg);
		return false;
	}
	return true;
}

function isInteger(n) {
	return (!isNaN(n)) && (Math.floor(n)==n)
}