<!--

function checkform() {
	form = document.postcardform;

	// check that SenderName was entered
	if(form.SenderName.value == "" || form.SenderName.value == "Your name") {
		alert("Please enter your name");
		form.SenderName.focus();
		return false;
	}

	// check that SenderEmail was entered
	if(form.SenderEmail.value == "") {
		alert("Please enter your email address");
		form.SenderEmail.focus();
		return false;
	}
	
	// check address validity
	var x=document.forms["postcardform"]["SenderEmail"].value;
	var atpos=x.indexOf("@");
	var dotpos=x.lastIndexOf(".");
	if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
	{
		alert("Your email address is not valid");
		return false;
	}
	
	// check that ReceiverName was entered
	if(form.ReceiverName.value == "" || form.ReceiverName.value == "Friend's name") {
		alert("Please enter your friend's name");
		form.ReceiverName.focus();
		return false;
	}

	// check that ReceiverEmail was entered
	if(form.ReceiverEmail.value == "") {
		alert("Please enter your friend's email address");
		form.ReceiverEmail.focus();
		return false;
	}
	
	// check address validity
	var x=document.forms["postcardform"]["ReceiverEmail"].value;
	var atpos=x.indexOf("@");
	var dotpos=x.lastIndexOf(".");
	if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
	{
		alert("Your friend's email address is not valid");
		return false;
	}
}


//-->