function submitform()
{
	formvalue	= (document.join_form)
		if (formvalue.firstname.value == "")
			{
			alert("Please give us your first name.");
			return;
			}
		else if (formvalue.lastname.value == "")
			{
			alert("Please give us your last name.");
			return;
			}
		else if (formvalue.phone.value == "")
			{
			alert("Please give us a phone number.");
			return;
			}
		else if (formvalue.email.value == "")
			{
			alert("Please give us your email.");
			return;
			}
		else
			{
			formvalue.submit();
			}	
}