博客探讨了在Web应用程序中如何使用隐藏字段传递值到JSP页面，并建议通过AJAX实现异步更新，强调了理解基本Web概念如JSP、JavaScript、HTTP方法等的重要性。
You need to place it somewhere so it could be pushed to your JSP page. A hidden field is a good option:
... // My code to get the value.
document.getElementById("nn").value = combo.getValue();
... you could submit the form here if you want
The value is : //to be displayed here
Other possibility might be using AJAX.
One way or another, I would suggest you reading a little bit more on general topics about Web Applications to differentiate JSP/JavaScript/POST/GET/CSS/HTML and other basic concepts.
Good luck!
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