function checkform()
{
	if (!document.getElementById("name").value)
	{
		alert ("Please enter your name.");
		return false;
	}
	
	if (
		!(
			(
				document.getElementById("address").value &&
				document.getElementById("city").value &&
				document.getElementById("state").value &&
				document.getElementById("zip").value
			) ||
			document.getElementById("phone").value ||
			document.getElementById("email").value
		))
	{
		alert ("Please enter your full address, phone number or email address.");
		return false;
	}
	
	if (!document.getElementById("message").value)
	{
		alert ("Please enter a message.");
		return false;
	}
	
	return true;
}