Js 弹出框 ，返回对象给父亲页面

    父亲页面代码：


 var obj = showModalDialog("/layouts/EditLayout.aspx?pagename=900&contentid=" + brickId, null, "dialogHeight:500px;dialogWidth:600px;");

 if (obj != null && obj.flag == true)
 {
     var argument = new Argument();
    
  argument.ContentId = brickId;
  designer.EventManager.FireEvent(designer.EventNameEnum.ReloadEvent, argument);
 }


           弹出页面代码，保存代码

                var returnObject = function() { this.flag = false; this.contentid = '';};                 
                 returnObject.flag = true; 
                 returnObject.contentid = 'dd'；
                 window.returnValue = returnObject;