As beginning,still don't know how to begin this post~but really should begin to write something about tech.Sometimes some one like to talk that A good bazoo can
make a good bussiness card~,may be so,may be not,I really want to throw it away,but cannot,just can to learn and write ...off topics...
  From now I propose to write a route about js tech with my learning steps.Ajax is a good thing maybe the world just like it some good but really short. Js is called for the full JavaScriptlanguage,it's welcomed because it can be run at the piont of client and also effective.when we talk about java object orientation is the focus piont which attracts our attention.we can define a class and then a function.But to JS ,when we create a function and make a instance of this function,we just regard it as a class,so we may say a newable function was a class.The class may have its own attributes or methods,but now we can use the sign["~"]to quote it(refer to).
Now I give a simple example about this

Of course,u can express with arr.push("Eric").After this,I want to say,we can insert,update & delete attributes or methods when we need.As following
user.name="Eric";
user.age="21";
user.sex="male";
//we insert 3 Atts/
user.show=function(){
  alert("Name is"+this.name);
}
//we insert 1 Mes/
delete is very very easy,a old story.. we use undefined
user.name=undefined;
user.show=undefined;
//....
This is js today's post,easiness goes,.~ ..