Challenge:
We may need to invoke the embedded page controls from the parent window or parent window controls from the embedded page using javascript
Solution:
It’s much as easy as like accessing the controls in the current form. The below code will help to access it.
Access parent control from Embedded page:
var sPONumber =window.parent.thisForm.controlManager.getControlByName(‘txtPONumber’).getValue()
Access embedded page controls from parent:
var sPONumber = window.frames[0].frameElement.contentWindow.thisForm.controlManager.getControlByName(‘txtPONumber’).getValue()