function check() {
	var str = document.zipme.zip.value;
	var reg = new RegExp("(^[0-9]{5}$)");
	if (reg.test(str)) {
		document.zipme.submit();
	}
	else {alert("Please provide a valid zip code.\nA valid zipcode is a numeric value composed of 5 digits.");
	}
	return false;
}