Over the past few weeks, you've learned a great deal about the various control structures and objects available in JSP. You've see how to retrieve information posted in an online form, and connect your JSP document to a database for dynamic content generation. This week in The JSP Files, we're going to tackle yet another very interesting topic − the problem of maintaining state on a Web site. We'll be looking at two common solutions to this problem − cookies and server−based sessions − and using