Month Name Function in Javascript

month-name.js

/**
 * @Month Name Javascript
 * @author Hatem A. <hatem@tuta.io>
 */
 
function monthName(num){
  
  num = parseInteger(num);
  
  var month;
  
  switch(str){
    case 1:
      month = "January";
      break;
    case 2:
      month = "February";
      break;
    case 3:
      month = "March";
      break;
    case 4:
      month = "April";
      break; 
    case 5:
      month = "May";
      break;  
    case 6:
      month = "June";
      break; 
    case 7:
      month = "July";
      break;  
    case 8:
      month = "August";
      break;  
    case 9:
      month = "September";
      break;
    case 10:
      month = "October";
      break; 
    case 11:
      month = "November";
      break;  
    case 12:
      month = "December";
      break; 
    default:
      month = null;
  }
  
  return month;
}