js兑现局部刷新 _Ajax

js实现局部刷新
js实现局部刷新,我想点击按钮,执行JS,然后让页面中的某个图层刷新,可以做到吗?

------解决方案--------------------
in the script:
document.getElementById("doit").innerHTML = "what you want to change information";

in the HTML:
<div id="doit">the place where you want to change</div>
------解决方案--------------------
dwr 实现局部刷新，很简单的，一下附上我做的一些小例子。 dwr.jar 楼主可以自己到网上下个

HTML code


<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <base href="<%=basePath%>">

        <title>My JSP 'index.jsp' starting page</title>
        <meta http-equiv="pragma"'