Load Dialog

Hi Experts,

I m using dialog in ui5 .

In parent page m having button, on click of which i need to open dialog.

I m using following code:

var oDialog1 = new sap.ui.commons.Dialog();

   oDialog1.addContent(new sap.ui.core.HTML("html1", { content : "<iframe   src='/XMII/CM/SAPUI5/TetraPak/SubTestDetails.irpt'  width='800' height='500' ></iframe>"  })  

                      );

      oDialog1.setModal(true);

  oDialog1.open();

  }});

It works fine but I have two query for dialog.

1) When i click on parent page button first time,it takes significant amount of time to load data in dialog popup.

Is there any specific reason for this? How i can resolve this?

2) Dialog has one cross button to close window.

I want additional button in popup window like "Close",on click of which it will close dialog popup.

I tried following in dialog popup:

             oDialog1.close();

But as oDialog1 defination is in parent page it gives error "oDialog1 is undefined ".

How i can access oDialog1 in dialog popup i.e child popup from parent page?

Please guide.

Thanks in advance.

Regards,

Neha