Just now , one user posted question : https://superuser.com/questions/68649/help-me-with-my-cisco-ios-config. 

When ever i am clicking that question Browser hangs for some time and recovered and show message for unresponsive script error message 

The message is this and asking for stop script or continue 
>A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script in the debugger, or let the script continue.
>
> Script: http://sstatic.net/su/js/master.js?v=5005:1