I am developing a chat client which can connect to gtalk and facebook.I was able to successfully authenticate and chat.Now am building the UI for the same. I am using jsp and servlets for the purpose.I am populating the users inside select tag.Now i want a pop up box to open upon clicking the user...

I used window.open(xxx.jsp).But it does not work.

Can anyone tel me how to proceed??
How do i create a pop up box upon clicking on a user