function validateForm()
{
	var f = document.frmForm;
	
	if (f.first_name.value == "")
	{
		alert("Please enter your first name.");
		f.first_name.focus();
		return false;
	}

	if (f.last_name.value == "")
	{
		alert("Please enter your last name.");
		f.last_name.focus();
		return false;
	}

	if (f.zip_code.value == "")
	{
		alert("Please enter your zip/postal code.");
		f.zip_code.focus();
		return false;
	}

	if (!isEmail(f.email.value))
	{
		alert("Please enter a valid email address.");
		f.email.focus();
		return false;
	}
	
	return true;
}

function submitForm()
{
	if (!validateForm()) return;
	
	document.frmForm.submit();
}