function show_hide(id, show) {
	if (el = document.getElementById(id)) {
		if (null==show) show = el.style.display=='none';
		el.style.display = (show ? '' : 'none');
	}
}

function checkMail(form) {
	if (form.email_to.value == "") {
			alert("Please enter a recipient.");
			form.email_to.focus();
			return false;
		}
	if (form.email_from_name.value == "") {
			alert("Please enter your name.");
			form.email_from_name.focus();
			return false;
		}
return true;
}