JavaScript helper function generates html options for days, months and years dropdowns

fiddle.html

<div id="container"></div>

fiddle.js

// Helper function generates html options for days, months and years dropdowns
function getBirthdayOptions(type, maxYear = 60, shiftYear = 0) {
  var html = '';

  switch (type) {
    case 'days':
      for (var i = 1; i < 32; i++) {
        html += '<option value="' + (i) + '">' + i + '</option>';
      }
    break;
    case 'months':
      var theMonths = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "Derember");
      for (var i = 0; i < 12; i++) {
        html += '<option value="' + (i+1) + '">' + theMonths[i] + '</option>';
      }
    break;
    case 'years':
      var currYear = new Date().getFullYear() - shiftYear;
      var startYear = new Date().getFullYear() - maxYear;

      while ( currYear >= startYear ) {
        html += '<option value="' + currYear + '">' + currYear + '</option>';
        currYear--;
      }
    break;
  }

  return html;
}

// Usage Example, with jQuery
$(document).ready(function () {
  $('#container').html(
    '<select name="month" class="first">' +
    '<option value="" disabled="disabled" selected="selected">Month</option>' + getBirthdayOptions('months') +
    '</select>' +
    '<select name="day">' +
    '<option value="" disabled="disabled" selected="selected">Day</option>' + getBirthdayOptions('days') +
    '</select>' +
    '<select name="year">' +
    '<option value="" disabled="disabled" selected="selected">Year</option>' + getBirthdayOptions('years') +
    '</select>');
});

fiddle.manifest

name: Birthday Options Helper
description: JavaScript helper function generates html options for days, months and years dropdowns
authors:
- Yevgeniy Viktorov
normalize_css: no

http://jsfiddle.net/gh/gist/jquery/1.9.1/4746242/

Nice one. I've fixed some problems in a fork: https://gist.github.com/pvcarrera/7748082 Typo: Deremberand default parameters