IT垃圾

父页面：
private var dialog:RequestApproval;//子页面名称（类）。

private function ondg1doubleclick():void
{
  dialog=RequestApproval(PopUpManager.createPopUp(this,RequestApproval,true));
  dialog.addEventListener("CALLINIT",callinit);
  dialog.datas=dg1.selectedItem;
  PopUpManager.centerPopUp(dialog);
}

private function callinit(e:Event):void
{
  PopUpManager.removePopUp(dialog);
  this.init();
}

子页面：

  var e:Event=new Event("CALLINIT",false,false);
  this.dispatchEvent(e);