Solutions for postback problem: 1. Add "<base target = “_self” />" inside <head> tag of the popup. 2. You can use window.open instead of window.showModalDialog. Solutions for session transfer problem:
1. You can use window.open instead of window.showModalDialog.
2. You can use AJAX modal popup.
This seems to be a IE bug (working fine in firefox and chrome), I have this problem if I open the .NET application after opening an instance of IE (say google.com) whereas if I open the former before the latter, things are fine.
Please let me know if anybody has any good solution for this.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.