jquery window.open in ajax success being blocked

For opening a new URL in the window you opened in onclick, do the following

1. Store the new window you created in a variable var newWindow = window.open("","_blank");
2. Change the location of the new window newWindow.location.href = newURL;

One additional thing that can be done to improve user experience is to send the new window to background immediately (newWindow.blur) after opening and then bring it in foreground again (newWindow.focus) while opening the URL the the new window.

Do a window.open("about:blank", "newPage"); before the AJAX call and then after the call add the URL to the opened window by calling window.open("http://google.com", "newPage");.