Receiving a 404 for the JSON file

var xhr = new XMLHttpRequest();

xhr.onreadystatechange = function () {
  if (xhr.readyState === 4) {
    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 + '</li>';
    }
    statusHTML += '</ul>';
    document.getElementById('employeeList').innerHTML = statusHTML;
  }
};

xhr.open('GET', '..data/employees.json');
xhr.send();