/* Check phone numbers for validity*/

$(document).ready(function(){
	$('#phone_number').change(function(){
		if ($('#phone_number').val() != ''){
			if ($('#phone_number').val().length < 10 || $('#phone_number').val().length > 11){
				alert('Your phone number must be 10 or 11 digits long');
			}

			start = $('#phone_number').val().substring(0,2);
			if (start != '01' && start != '02' && start != '03'){
				alert('Sorry, that does not look like a valid phone number');
			}
		}
	});
});