brandonneil

function hostReachable(location) {
  if (!location) {
    location = window.location.hostname + "/";
  }
  // Handle IE and more capable browsers
  var xhr = new ( window.ActiveXObject || XMLHttpRequest )( "Microsoft.XMLHTTP" );
  var status;

  // Open new request as a HEAD to the root hostname with a random param to bust the cache
  xhr.open( "HEAD", "//" + location + "?rand=" + Math.floor((1 + Math.random()) * 0x10000), false );