有高手能帮忙看一下怎么把mootools的一段代码移植到jquery下面吗

//a silly and simple example clientside NGiNX_HTTP_Push_Module application using mootools.
//Made in late 2009 by Leo Ponomarev. Code released under the MIT license.

//example versatile subscriber
var Subscriber = function(url, successCallback, failureCallback) {
 var etag, lastModified; //brute-force the caching headers for some dumb browsers
 //(Not naming names, but let's say it's version 6 and it rhymes with Ninternet Nexplorer)
 
 this.url = url;
 
 var listener = new Request({url: url, method: 'get'});
 var maybeSendListenerRequest = function() {
  listener.setHeader("If-None-Match", etag).setHeader("If-Modified-Since", lastModified).send();
 }.bind(this);
 function listen(when) {
  if(when===false) { return; }
  setTimeout(maybeSendListenerRequest, $type(when)=='number' ? when : 0);
  return this;
 }
 
 listener.addEvents({
  success: function listenerSuccess(resp) {
   etag=this.getHeader('Etag');
   lastModified=this.getHeader('Last-Modified');
   if($type(successCallback)=='function') {
    listen(successCallback.bind(this)(resp));
   }
  },
  failure:function(resp) {
   if($type(failureCallback)=='function') {
    listen(failureCallback.bind(this)(resp));
   }
  }
 });

 this.getListener = function getListener() { return listener; }; //someone might think this useful...
 this.listen = listen;
}

//And now for our feature presentation
var Dumbchat = new Class({
 Implements: Events,
 initialize: function(sendform, receivelist, suburl, username) {
  this.sendform = sendform, this.receivelist = receivelist, this.suburl = suburl, this.username = username || this.generateUsername();
  return this;
 },
 connect: function(){
  var sendform = this.sendform, receivelist = this.receivelist, suburl = this.suburl, username = this.username;
  sendform.addEvent('submit', function(ev) {
   ev && ev.stop();
   var msgEl = sendform.getElement("input[name=message]");
   var msg = msgEl.value;
   this.send({username: this.username, message: msg});
   msgEl.set('value', '');
  }.bind(this));
  
  var delay = 500; //error delay
  var dumbchat = this;
  
  var subscriber = new Subscriber(suburl,
   function success(textResp) {
    var el=new Element('li');
    var resp = JSON.decode(textResp, true);
    if(resp) {
     if(resp.notice) {
      var notice;
      switch(resp.notice) {
       case 'hi':
        notice = (resp.username || "???") + " joins the chat.";
        dumbchat.fireEvent("join", [ resp.username ]);
        break;
       case 'bye':
        notice = (resp.username || "???") + " leaves.";
        dumbchat.fireEvent("leave", [ resp.username ]);
        break;
       case 'rename':
        notice = (resp.username || "???") + " is now known as " + (resp.newname || "???") + ".";
        break;
      }
      el.set({
       'class':'notice',
       'text': notice
      });
     }
     else if(resp.message) {
      el.set({
       'class':'message',
       'text': (resp.username || "???") + ": " + resp.message
      });
      if(resp.username==dumbchat.username) {
       el.addClass('iSay');
      }
     }
     receivelist.grab(el, 'bottom');
     receivelist.scrollTop = receivelist.scrollHeight; //quick 'n' dirty scroll to bottom
    }
    else {
     //el.set({'class':'error', text:'There was an error: ' + textResponse});
     dumbchat.fireEvent('clientError');
    }
   },
   function failure(resp) {
    dumbchat.fireEvent('serverError');
    delay = delay * 1.5;
    return delay;
   }
  );
   
  subscriber.listen();
  
  this.send = function () {
   var req = new Request({
    url: sendform.get('action'),
    method: 'post',
    urlEncoded : false,
    headers: {"Content-Type":"text/json", "Accept":"text/json"}
   }).addEvent('success', function(resp) {
    dumbchat.fireEvent('send', [resp]);
   });
   return function (data) {
    req.send({data: JSON.encode(data)});
    return this;
   }.bind(this);
  }.bind(this)();
  
  this.disconnect = function disconnect() {
   if(subscriber) {
    subscriber.getListener().cancel();
    dumbchat.send({username: this.username, notice:"bye"});
    subscriber = false;
   }
   return this;
  };
  
  return this.send({username: this.username, notice:"hi"});
 },
 
 'rename': function(newname) {
  if(newname!=this.username) {
   this.send({username:this.username, notice:"rename", newname: newname});
   this.username=newname;
  }
  return this;
 },
 
 generateUsername: function() {
  return "J.Doe" + Math.floor(Math.random()*1000);
 }
});