日期:2014-05-16 浏览次数:20549 次
<%@ page contentType="text/plain;charset=utf-8" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>BookInfo.htm</title> <script language="JavaScript"> var xmlHttp; function createXMLHttpRequest() { if (window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); } else { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } } //获取数据的调用函数 function Query() { var value = myform.users.value; alert(value); createXMLHttpRequest(); xmlHttp.onreadystatechange = getData; xmlHttp.open("GET","SearchBook.jsp?value="+value,true); xmlHttp.send(null); } //回调函数 function getData() { if(xmlHttp.readyState == 4 && xmlHttp.status==200) { document.getElementById('bookinfo').innerHTML = xmlHttp.responseText; } } </script> </head> <body> <h1>实验三下拉菜单示例</h1> <form action="myform"> 选择图书编号: <select name="users" onchange="Query()"> <option value="1"> 1程序设计 </option> <option value="2"> 2网络维护 </option> <option value="3"> 3多媒体设计 </option> </select> </form> <div id="bookinfo"> </div> </body> </html>
<%@ page contentType="text/plain;charset=UTF-8"%> <%@ page language="java"%> <% out.clear();//清空当前的输出内容(空格和换行符) String valueStr = request.getParameter("value"); String bookinfo = null;//用于保存详细信息 if (valueStr != null) { if("1".equals(valueStr)) { bookinfo = "bookinfo详细信息1:我是xxxxx!!!!!!!"; } else if("2".equals(valueStr)) { bookinfo = "bookinfo详细信息2:欢迎进入我的空间!!!!"; } else { bookinfo = "bookinfo详细信息3:成功感言!!!!!!!!"; } } //根据是否包含正确内容决定输出的信息 if (null != bookinfo) { out.println(bookinfo); } else { out.println("无法或者book详细信息"); } %>