jquery隐藏和显示菜单

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1、//使用eclipse新建一个web项目//在web/js目录下添加jquery-1.8.1.min.js   （官方下载jquery.js文件）//src目录下的 com.dyg.servlet.CityListServlet类   servlet类提供默认城市列表packagecom.dyg.servlet;importjava.io.IOException;importjava.util.ArrayList;importjava.util.List;importjavax.servlet.ServletException;importjavax.servlet.http.HttpS

2、ervlet;importjavax.servlet.http.HttpServletRequest;importjavax.servlet.http.HttpServletResponse;publicclassCityListServletextendsHttpServlet{ privatestaticfinallongserialVersionUID=1L; publicCityListServlet(){  super(); } publicvoiddestroy(){  super.destroy();//Justputs"destroy"stringinlog  //Put

3、yourcodehere } publicvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)   throwsServletException,IOException{  doPost(request,response); } publicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)   throwsServletException,IOException{  response.setContentType("text/htm

4、l");  request.setCharacterEncoding("GBK");  response.setCharacterEncoding("GBK");  Listcitys=newArrayList();  citys.add("深圳");  citys.add("北京");  citys.add("上海");  citys.add("武汉");  citys.add("长沙");  citys.add("东莞");  citys.add("佛山");  request.setAttribute("citys",citys);  request

5、.getRequestDispatcher("index.jsp").forward(request,response); } publicvoidinit()throwsServletException{  //Putyourcodehere }}//index.jsp  web目录下的index.jsp<%@pagelanguage="java"pageEncoding="GBK"%><%@tagliburi="http://java.sun.com/jsp/jstl/core"prefix="c"%>

6、ansitional//EN">                  

7、tent="Thisismypage">    functionchange2(){    varc=$("a");    if(c.html()=='展开城市列表'){        $('#city').show();        c.