Vanilla JS getHTTPObject AJAX request

getHTTPObject.js

// Reusable x-browser XMLHttpRequest
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; 
}

function grabFile(file) {
  var request = getHTTPObject();
  //GET
  if (request) {
    request.open('GET', file, true);
    request.send(null);
    request.onreadystatechange = function(){
      if (request.readyState != 4) return false;
      if (request.status == 200 || request.status == 304) {
        console.log(request.responseText);
      }
    };
  }
}