function grabFile(file) {
  var requestFile = getHTTPObject();
  if (requestFile) {
    requestFile.onreadystatechange = function() {
      parseResponseFile(requestFile);
    };
    requestFile.open("GET", file, true);
    requestFile.send(null);
    return true;
  } else {
    return false;
  }
}

function grabNom(file) {
  var request = getHTTPObject();
  if (request) {
    request.onreadystatechange = function() {
      parseResponse(request);
    };
    request.open("GET", file, true);
    request.send(null);
    return true;
  } else {
    return false;
  }
}

function parseResponse(request) {
  if (request.readyState == 4) {
    if (request.status == 200 || request.status == 304) {
      var mainContent = document.getElementById("main_content");
      mainContent.innerHTML = request.responseText;
    }
  }
}

function parseResponseFile(requestFile) {
  if (requestFile.readyState == 4) {
    if (requestFile.status == 200 || requestFile.status == 304) {
      var mainContent = document.getElementById("main_content");
      mainContent.innerHTML = requestFile.responseText;
    }
  }
}

function getHTTPObject() {
  var xhr = false;
  if (window.XMLHttpRequest) {
    xhr = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    try {
      xhr = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e) {
      try {
        xhr = new ActiveXObject("Microsoft.XMLHTTP");
      } catch(e) {
        xhr = false;
      }
    }
  }
  return xhr;
}