实现基于Ajax的无限级菜单(1)(2)

mId菜单主键 
name　菜单名称 
url菜单链接 
father　低级菜单ＩＤ 
sub是否最底层菜单（用于判断是否还可以继续展开） 
target　菜单链接目标(用ajax方式打开时作为显示id) 
pa　菜单参数(这项用于ajax方式打开菜单) 
 

class Menu{ 
private int mId; 
private String name; 
...//其它成员 
public getMid(){ 
return mId; 
} 
public setMid(int mId){ 
this.mId = mId; 
} 
....//其它成员的get set方法， 
} 
 

class MenuOpt(){ 
public Vector getMenus(int father){ 
Vector vector = new Vector(); 
//这里是取得父级菜单ＩＤ为father的全部菜单 
//并封装进Vector的一个对象中。。 
return vector; 
} 
} 

%@page contentType="text/html; charset=GB2312"%> 
%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> 
jsp:useBean id="menu" scope="page" class="ycoe.basic.MenuOpt"/> 
jsp:setProperty name="menu" property="father" value="${param.father}"/> 
div> 
c:forEach var="m" items="${menu.vector}" varStatus = "c"> 
c:choose> 
c:when test="${m.sub eq 'Y'}"> 
div onClick="showMenu('${m.mid}','${m.url}','${m.target}','father=${m.mid}')"> 
img src="pic/menu0.gif" id="img${m.mid}" alt="" style=" cursor:hand;"> 
a href="#" class="text1">${m.name} 
/div> 
div style="display:none;" id="tr${m.mid}"> 
div style="padding-left:12pt" id="${m.mid}"> 
/div> 
/c:when> 
c:otherwise> 
div onclick="openMenu('${m.url}','${m.target}','${m.pa}');"> 
img src="pic/menu1.gif" id="img${m.mid}" alt=""> 
a href="#" class="text1">${m.name} 
/div> 
menu.js： 
//operMenu(打开下拉菜单的ＩＤ，打开的地址,链接打开的目标，参数)。 
//这是用在menu.jsp的方法 
function showMenu(id,url,target,param){ 
var trObj = document.getElementById("tr"+id); 
var tdObj = document.getElementById(id); 
//try{ 
if(document.getElementById("tr"+id).style.display == "none"){ 
//显示菜单 
if(tdObj.innerHTML == null || tdObj.innerHTML == ""){ 
//提取数据 
document.getElementById("tr"+id).style.display = ""; 
document.getElementById("img"+id).src = "pic/menu2.gif" 
Bcandy(id,"page/menu.jsp",param,""); 
openMenu(url,target,param); 
}else{ 
//如果里面有内容，直接显示 
document.getElementById("tr"+id).style.display = ""; 
document.getElementById("img"+id).src = "pic/menu2.gif" 
openMenu(url,target,param); 
} 
//Bcandy(target,url,param,"");//打开菜单链接 
}else{ 
//隐藏菜单 
document.getElementById("tr"+id).style.display = "none"; 
document.getElementById("img"+id).src = "pic/menu0.gif" 
} 
//}catch(e){} 
} 
//打开菜单 
function openMenu(url,target,param){ 
//这里不用我写了吧。有好几种实现方法，建议使用ajax实现！ 
} 

%@ page contentType="text/html; charset=GB2312" %> 
meta http-equiv=Content-Type content="text/html; charset=gb2312"> 
style> 
.text1:hover { border: 1px #999999 solid; background-color: #CCCCCC; height: 12px;} 
.text1{border: 1px #FFFFFF solid; height: 12px;} 
function ini(){ 
Bcandy("0","menu.jsp","id=0&father=0","menu.js"); 
} 
body onload="ini();"> 
div id="load" style="z-index:1; color:#FF0000; 
visibility:hidden; filter: Alpha(opacity=85); 
background-color:#FFFFFF; left: 48%; top: 48%;
BORDER-RIGHT: #000000 1px solid; 
PADDING-RIGHT: 12px; BORDER-TOP: #000000 1px solid; 
PADDING-LEFT: 12px;PADDING-BOTTOM: 12px; 
BORDER-LEFT: #000000 1px solid; 
LINE-HEIGHT: 22px; PADDING-TOP: 12px; 
BORDER-BOTTOM: #000000 1px solid; POSITION: absolute;"> 
img src='pic/loop.gif' alt="">
数据处理中，请稍候... 
br> 
div id="0" align="center"> 

for{ 
　if(如果是最上层菜单sub=N){ 
　div id="t${m.id}" onClick="ShowMenu(${m.father....})"> 
显示菜单内容 
　div style="display:none" id="td${m.id....}"> 
　}else{ 
div onClick="OpenMenu(${m.id})">显示菜单内容 
　} 
}