JavaScript ModalPopupExtender Issue with Iframe PDF.

Question

Hi All,

 

I am having web page where I am using iframe to show pdf file and same web page having modalpopupextender. on page load iframe load pdf file successfully, but when modalpopupextender called pdf hides the modal popup.

 

I have tried Z-index and everything but not worked.

 

Please suggest the solution...

Thanks in advance...