function validate()
{
	var form = document.getElementById("pb_form");
	var elements = form.elements;

	if (blank(elements["name"]) || blank(elements["email"]))
	{
		window.alert("Please enter a name and email address for future correspondence.");
		return false;
	}

	return true;
}

function blank(input)
{
	var blankre = /^[\s]*$/;
	return blankre.test(input.value);
}