function validate_guestbook_sign()
{
	var errmsg = '';
	if(document.sign_guestbook.name.value == ''){errmsg = "Name\n";}
	if(document.sign_guestbook.city.value == ''){errmsg = errmsg+"City\n";}
	if(document.sign_guestbook.state.value == ''){errmsg = errmsg+"State\n";}
	if(document.sign_guestbook.message.value == ''){errmsg = errmsg+"Message\n";}
	
	
	if(errmsg != '')
	{
		alert("The following field(s) are required:\n----------------------------------------\n"+errmsg);
	}
	else
	{
		document.sign_guestbook.submit();
	}
}