gitawego

//event naviagor.onLine isn't fiable.
function serverReachable() {
  // IE vs. standard XHR creation
  var x = new ( window.ActiveXObject || XMLHttpRequest )( "Microsoft.XMLHTTP" ),
      s;
  x.open(
    // requesting the headers is faster, and just enough
    "HEAD",
    // append a random string to the current hostname,
    // to make sure we're not hitting the cache