Uncaught TypeError: Cannot read property 'inoffice' of undefined

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 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();