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var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
  if(xhr.readyState === 4 && xhr.status === 200) {
    var employees = JSON.parse(xhr.responseText);
    var statusHTML = '<ul class="bulleted">';
    for (var i=0; i<employees.length; i += 1) {
      if (employees[i].inoffice === true) {
        statusHTML += '<li class="in">';
      } else {
        statusHTML += '<li class="out">';
      }
      statusHTML += employees[i].name;
      statusHTML += '</li>';
    }
    statusHTML += '</ul>';
    document.getElementById('employeeList').innerHTML = statusHTML;
  }
};
xhr.open('GET', '../data/employees.json');
xhr.send();

var xhrRoom = new XMLHttpRequest;

xhr.onreadystatechange = new function(){
  if (xhrRoom.readyStage === 4){
    var room = JSON.parse(xhrRoom.responseText);
    var HTMLRoom = '<ul class="rooms">';

    for (var i = 0; i<room.length; i++){
      if (room[i].available === true) {
        HTMLRoom += '<li class="empty">';

      } else {
        HTMLRoom += '<li class="full">';
      }
      HTMLRoom += room[i].room;
      HTMLRoom += '</li>';
    }
    HTMLRoom += '</ul>';
    document.getElementById("roomList").innerHTML(HTMLRoom);
  }
}
xhrRoom.open("GET", "../data/rooms.json");
xhrRoom.send()