javascript 对象可否如下定义?
function FieldLoginName(form){
this._fieldUI = $("#loginName"); // JQuery Object that is
this._messageUI = $("#uiLoginName>span"); //JQuery Object where show the massages
this._model = new ModelLoginName(); // corresponding model object
this._hintMsg;
this.form = from;
this.msgManager = new MessageManager(); // messages manager object