proprietà di un oggetto di un oggetto (standard)

[Fire-Dragon-DoL]

Ho fatto un piccolo update al codice javascript...uso questo:

adesso ci sono quasi...il problema è che si ferma a readyState 0(uninitialized)

function lib_xml_initialize() {
    //Properties
    this.obj=null;
    this.Loading="Loading...";
    this.Writer="mypage";

    //Methods
    this.Page=function () {
        alert("pagina"+this.obj.readyState);
        if (this.obj.readyState==0) {//Uninitialized
            //
        }
        if (this.obj.readyState==1) {//Loading
            document.getElementById(this.Writer).innerHTML=this.Loading;
        }
        if (this.obj.readyState==2) {//Loaded
            //
        }
        if (this.obj.readyState==3) {//Interactive
            //
        }
        if (this.obj.readyState==4) {//Complete
            document.getElementById(this.Writer).innerHTML=this.obj.responseText;
        }
    }

    this.AdvancedLoad=function (tipo,surl,async,tosend,user,pass) {
        if (this.obj==null) {
            alert("Your browser doesn't support XMLHTTP");
            return false;
        }
        try {
            alert("lol");
            this.obj.open(tipo,surl,async,user,pass);
            this.obj.send(tosend);
            return true;
        } catch(e) {
            alert("Problems in loading the page");
            return false;
        }
        return true;
    }

    this.Load=function (tipo,surl,async,tosend) {
        if (this.obj==null) {
            alert("Your browser doesn't support XMLHTTP");
            return false;
        }
        try {
            alert("lol");
            this.obj.open(tipo,surl,async);
            this.obj.send(tosend);
            return true;
        } catch(e) {
            alert("Problems in loading the page");
            return false;
        }
        return true;
    }

    this.EasyLoad=function (surl) {
        return this.Load("GET",surl,true,null);
    }

    try {
        // Firefox, Opera 8.0+, Safari
        this.obj=new XMLHttpRequest();
    } catch (e) {
        // Internet Explorer
        try {
            this.obj=new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            this.obj=new ActiveXObject("Microsoft.XMLHTTP");
        }
    }

    //Events
    this.obj.onreadystatechange=this.Page();
}