function validateForm()
{
	if (document.form1.first_name.value == "")
		alert("Please enter your first name.");
	else if (document.form1.last_name.value == "")
		alert("Please enter your last name.");
	else if (document.form1.contact_by_email.checked && document.form1.email.value == "")
		alert("Please enter your E-Mail address.");
	else if (document.form1.contact_by_phone.checked && document.form1.phone.value == "")
		alert("Please enter your phone number.");
	else if (!document.form1.contact_by_email.checked && !document.form1.contact_by_phone.checked)
		alert("Please select the best way for us to contact you.");
	else if (document.form1.comments.value == "")
		alert("Please enter your comment/question.");
	else
		document.form1.submit();
}