JQuery中this的指向详解

var Socket =
{
    connect: function(host, port)
    {
        alert('Connecting socket server,host:' + host + ',port:' + port);
    }
};

//一个即时通讯类，其中connect方法还将作为AJAX回调函数被调用
function classIm()
{
    this.host = '192.168.1.28';
    this.port = '8080';
    this.connect = function(data)
    {
      socket.connect(this.host, this.port);
    };
}

var IM = new classIm();
$.get('CheckWEBLogin.aspx', IM.connect);
//弹出的host与port都是undefined。

$.ajax({
    context:IM,
    type:'get',
    ulr:”page.html”,
    success:IM.connect
})

$.get(”page.html”,$.proxy(IM.context,IM))

function classIm()
{
    var self = this;
    this.host = '192.168.1.28';
    this.port = '8080';
    this.connect = function(data)
    {
        socket.connect(self.host, self.port);
    };
}

Function.prototype.Proxy = function(thisObj)
{
    var _method = this;
    return function(data)
    {
        return _method.apply(thisObj,[data]);
       //或者
       return  function()
       {ret _fn.apply(thisObj,arguments);};
    };

}
//调用：
var IM = new classIm();
$.get('CheckWebLogin.aspx', IM.connect.Proxy(IM));

$.get('page.html', function(data){
    IM.connect(data)
});

$('#a').bind('click'{self:this},this.onClick);

function onClick(event){
  var self=event.data.self;
}

$("#a").click($.proxy(myFun,this));
//或 
$("#a").click(myFun.Proxy(this));