$(document).ready(function() {
	$('#address2div, #address3div').hide();

	$('#howlong').blur(function(){
		var dateObj = new Date();
		var currentYear = new String(dateObj.getFullYear());

		var inputYear = new String($(this).val());
		var difference = currentYear.substring(2, 4) - inputYear.substring(0, 2);

		if ( !isNaN(parseInt(difference)) ) {
			if ( difference == "0" ) {
				$('#address2div, #address3div').hide();
			} else if ( difference == "1" ) {
				$('#address2div').show();
				$('#address2_1').focus();
				$('#address3div').hide();
			} else if ( difference >= "2" ) {
				$('#address2div, #address3div').show();
				$('#address2_1').focus();
			}
		} else {
			alert('Invalid date! Please make sure you use this form: YY/MM');
		}
	});

	//$('#dob').datePicker();
});