$(document).ready(function() {
	function validEmail(email) {
		if (email.search("@") == -1 || email.search(".") == -1) return false;
		if (email.length < 8) return false;
		return true;
	}
	// function validPhone(phone) {
	// 	if (phone.length < 10) return false;
	// 	return true;
	// }
	function validSerialNumber(serial) {
		if (serial.length < 6) return false;
		return true;
	}
	// $(".desc").hide();
	$("#tradeinform").submit( function() {
		// alert ($("input[name='contacthow']:checked").val());
		// return false;
		$(".required[value='']").addClass("missing_required");
		if ($(".required[value='']").length>0) { 
			alert("Please fill in all required fields!");
			return false;
		}
		if (!validEmail($("#email").val())) {alert("Please enter a valid email address."); return false;}
		// if ($("input[name='contacthow']:checked").val()=='phone' && !validPhone($("#phone").val())) {alert("Please enter a valid phone number, including area code."); return false;}
		if (!validSerialNumber($("#serial").val()) ) {
			$(".info[value='']").addClass("missing_required");
			if ($(".info[value='']").length>0) { 
				alert("We need more information to work with.  Please either enter the serial number of your Mac, OR its model, screen size and processor speed.");
				return false;
			}
		} 
		return true;
		});
	});