How to position Dialog on top of page

Hi Dear,

I have a code to open a Dialog box, but it always opens in center of the page. I need it opens on top of page. I already tried this code below, but it didn't work too.

//Get the offset position of anchor link relative to the document

var offset = oTableLink.$().offset(); or // $("#link_id").offset();

//Set the position of dialog relative to the document

• oDialog.$().offset({

     top : offset.top

     left : offset.left

})

Here is my code:

var oDialog1 = new sap.ui.commons.Dialog({ modal: true});

oDialog1.setTitle("Production Confirmation:");

oDialog1.addContent(oMatrix);

oDialog1.addButton(oButtonConfirm);

oDialog1.addButton(oButtonCancel);

oDialog1.open();

Best regards,