How to close a popup after login using selenium IDE

Hi,

In my web based application, popup will get display with options to the user to save username or not after login

 Yes or no radio buttons options and also (X) button will be there in the top right corner of the popup.

Need help to close or choose some value in the popup

Does the pop up have a title or an id?

Yes. It has a title

That popup you show it's browser popup so u dont control with selenium ide