From a JSP called "ABC.jsp", when I click "View Item" button it should call corresponding action class,process and display results(displayitems.jsp) in a popup window. for some reason if the result is error page or login page then the popup window should not be opened rather it should replace ABC.jsp in main window.
i.e. If result is displayitems.jsp I want to open this jsp in pop up window and keep ABC.jsp open in main window. If result is some other page I want to replace ABC.jsp with result page in main window.
how to do this opening the popup window conditionally i.e. based on result page?