js 做的 checkbox tree

dtree.css文件内容：
.dtree {
font-family: Verdana, Geneva, Arial, Helvetica, sans-serif;
font-size: 11px;
color: #666;
white-space: nowrap;
}
.dtree img {
border: 0px;
vertical-align: middle;
}
.dtree a {
color: #333;
text-decoration: none;
}
.dtree a.node, .dtree a.nodeSel {
white-space: nowrap;
padding: 1px 2px 1px 2px;
}
.dtree a.node:hover, .dtree a.nodeSel:hover {
color: #333;
text-decoration: underline;
}
.dtree a.nodeSel {
background-color: #c0d2ec;
}
.dtree .clip {
overflow: hidden;
}


tree.js内容
/*--------------------------------------------------|
| dTree 2.05 | www.destroydrop.com/javascript/tree/ |
|---------------------------------------------------|
| Copyright (c) 2002-2003 Geir Landr?              |
|                                                   |
| This script can be used freely as long as all     |
| copyright messages are intact.                    |
|                                                   |
| Updated: 17.04.2003                               |
|--------------------------------------------------*/


//==================================================
//luzhilin
//==================================================
//修改历史：
//1、2006-05-11 将dtree修改成可以选择的权限树，
//   将name转变成<input type='checkbox'>
//
//==================================================
// Node object
function Node(id, pid, cname, cvalue, cshow, cchecked, cdisabled, url, title, target, icon, iconOpen, open) {
this.id = id;
this.pid = pid;
//chechbox的名称
this.cname = cname;
//chechbox的值
this.cvalue = cvalue;
//chechbox的显示
this.cshow = cshow;
//chechbox是否被选中，默认是不选
this.cchecked = cchecked||false;
//chechbox是否可用，默认是可用
this.cdisabled = cdisabled||false;
//节点链接，默认是虚链接
this.url = url||'#';
this.title = title;
this.target = target;
this.icon = icon;
this.iconOpen = iconOpen;
this._io = open || false;
this._is = false;
this._ls = false;
this._hc = false;
this._ai = 0;
this._p;
};

// Tree object
function dTree(objName) {
this.config = {
target : null,
folderLinks : false,
useSelection : false,
useCookies : false,
useLines : true,
useIcons : false,
useStatusText : true,
closeSameLevel : false,
inOrder : false
}
this.icon = {
root : 'img/base.gif',
folder : 'img/folder.gif',
folderOpen : 'img/folderopen.gif',
node : 'img/page.gif',
empty : 'img/empty.gif',
line : 'img/line.gif',
join : 'img/join.gif',
joinBottom : 'img/joinbottom.gif',
plus : 'img/plus.gif',
plusBottom : 'img/plusbottom.gif',
minus : 'img/minus.gif',
minusBottom : 'img/minusbottom.gif',
nlPlus : 'img/nolines_plus.gif',
nlMinus : 'img/nolines_minus.gif'
};
this.obj = objName;
this.aNodes = [];
this.aIndent = [];
this.root = new Node(-1);
this.selectedNode = null;
this.selectedFound = false;
this.completed = false;
};

// Adds a new node to the node array
dTree.prototype.add = function(id, pid, cname, cvalue, cshow, cchecked, cdisabled, url, title, target, icon, iconOpen, open) {
this.aNodes[this.aNodes.length] = new Node(id, pid, cname, cvalue, cshow, cchecked, cdisabled, url, title, target, icon, iconOpen, open);
};

// Open/close all nodes
dTree.prototype.openAll = function() {
this.oAll(true);
};
dTree.prototype.closeAll = function() {
this.oAll(false);
};

// Outputs the tree to the page
dTree.prototype.toString = function() {
var str = '<div class="dtree">\n';
if (document.getElementById) {
if (this.config.useCookies) this.selectedNode = this.getSelected();
str += this.addNode(this.root);
} else str += 'Browser not supported.';
str += '</div>';
if (!this.selectedFound) this.selectedNode = null;
this.completed = true;
return str;
};

// Creates the tree structure
dTree.prototype.addNode = function(pNode) {
var str = '';
var n=0;
if (this.config.inOrder) n = pNode._ai;
for (n; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == pNode.id) {
var cn = this.aNodes[n];
cn._p = pNode;
cn._ai = n;
this.setCS(cn);
if (!cn.target && this.config.target) cn.target = this.config.target;
if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);
if (!this.config.folderLinks && cn._hc) cn.url = null;
if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) {
cn._is = true;
this.selectedNode = n;
this.selectedFound = true;
}
str += this.node(cn, n);
if (cn._ls) break;
}
}
return str;
};

// Creates the node icon, url and text
dTree.prototype.node = function(node, nodeId) {
var str = '<div class="dTreeNode">' + this.indent(node, nodeId);
if (this.config.useIcons) {
if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);
if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;
if (this.root.id == node.pid) {
node.icon = this.icon.root;
node.iconOpen = this.icon.root;
}
str += '<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
}
if (node.url) {
str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '"';
if (node.title) str += ' title="' + node.title + '"';
if (node.target) str += ' target="' + node.target + '"';
if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.cname + '\';return true;" onmouseout="window.status=\'\';return true;" ';
if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))
str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';
str += '>';
}
else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" class="node">';
//===============================================
//2006-05-11 将原链接的节点修改为 checkbox
//===============================================
//str += node.name;
if(node.pid == this.root.id){
str += node.cname;
}else{
/**组装checkbox开始*/
checkboxSyntax = "<input type='checkbox' desc='" + node.cshow + "' name='" + node.cname + "' id='" + node.cname + "_" + node.id + "' value='" + node.cvalue + "' onClick='javascript: " + this.obj + ".checkNode(" + node.id+","+node.pid+","+node._hc + ",this.checked);' ";
//是否被选中
if(node.cchecked)
checkboxSyntax += " checked ";
//是否可用
if(node.cdisabled)
checkboxSyntax += " disabled ";
checkboxSyntax += ">" + node.cshow;
/**组装checkbox结束*/

str += checkboxSyntax;
}

if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';
str += '</div>';
if (node._hc) {
str += '<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">';
str += this.addNode(node);
str += '</div>';
}
this.aIndent.pop();
return str;
};

// Adds the empty and line icons
dTree.prototype.indent = function(node, nodeId) {
var str = '';
if (this.root.id != node.pid) {
for (var n=0; n<this.aIndent.length; n++)
str += '<img src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" alt="" />';
(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
if (node._hc) {
str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');"><img id="j' + this.obj + nodeId + '" src="';
if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;
else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) );
str += '" alt="" /></a>';
} else str += '<img src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" alt="" />';
}
return str;
};

// Checks if a node has any children and if it is the last sibling
dTree.prototype.setCS = function(node) {
var lastId;
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id) node._hc = true;
if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;
}
if (lastId==node.id) node._ls = true;
};

// Returns the selected node
dTree.prototype.getSelected = function() {
var sn = this.getCookie('cs' + this.obj);
return (sn) ? sn : null;
};

//===============================
// luzhilin 2006-05-11
//
//作用：选中节点对象
//参数：nobj node对象
//      cobj checkbox对象
//===============================
dTree.prototype.checkNode = function(id,pid,_hc,checked) {
//1、递归选父节点对象（无论是叶节点还是中间节点）
//判断同级中有无被选中的，如果有选中的就不可以反选
if(!this.isHaveBNode(id,pid)){
if(checked){
//选中就一直选到根节点
this.checkPNodeRecursion(pid,checked);
}else{
//去掉选中仅将其父节点去掉选中
this.checkPNode(pid,checked);
}
}

//2、如果是中间结点，具有儿子，递归选子节点对象
if(_hc)
this.checkSNodeRecursion(id,checked);

}

//===============================
// luzhilin 2006-05-11
//
//作用：判断同级中有无被选中的
//参数：id 节点id
//      pid 节点的父节点id
//===============================
dTree.prototype.isHaveBNode = function(id,pid) {
var isChecked = false
for (var n=0; n<this.aNodes.length; n++) {
// 不是节点自身、具有同父节点兄弟节点
if (this.aNodes[n].pid!=-1&&this.aNodes[n].id!=id&&this.aNodes[n].pid == pid) {
if(eval("document.all."+ this.aNodes[n].cname + "_" + this.aNodes[n].id + ".checked"))
isChecked = true;
}
}

return isChecked;
};

//===============================
// luzhilin 2006-05-11
//
//作用：递归选中父节点对象
//参数：pid 节点的父节点id
//      ischecked 是否被选中
//===============================
dTree.prototype.checkPNodeRecursion = function(pid,ischecked) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid!=-1&&this.aNodes[n].id == pid) {
eval("document.all."+ this.aNodes[n].cname + "_" + this.aNodes[n].id + ".checked = " + ischecked);
this.checkPNodeRecursion(this.aNodes[n].pid,ischecked);
break;
}
}
};

//===============================
// luzhilin 2006-05-11
//
//作用：递归选中子节点对象
//参数：id 节点id
//      ischecked 是否被选中
//===============================
dTree.prototype.checkSNodeRecursion = function(id,ischecked) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid!=-1&&this.aNodes[n].pid == id) {
eval("document.all."+ this.aNodes[n].cname + "_" + this.aNodes[n].id + ".checked = " + ischecked);
this.checkSNodeRecursion(this.aNodes[n].id,ischecked);
}
}
};

//===============================
// luzhilin 2006-05-11
//
//作用：仅选中父节点对象
//参数：pid 节点的父节点id
//      ischecked 是否被选中
//===============================
dTree.prototype.checkPNode = function(pid,ischecked) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid!=-1&&this.aNodes[n].id == pid) {
eval("document.all."+ this.aNodes[n].cname + "_" + this.aNodes[n].id + ".checked = " + ischecked);
break;
}
}
};

// Highlights the selected node
dTree.prototype.s = function(id) {
if (!this.config.useSelection) return;
var cn = this.aNodes[id];
if (cn._hc && !this.config.folderLinks) return;
if (this.selectedNode != id) {
if (this.selectedNode || this.selectedNode==0) {
eOld = document.getElementById("s" + this.obj + this.selectedNode);
eOld.className = "node";
}
eNew = document.getElementById("s" + this.obj + id);
eNew.className = "nodeSel";
this.selectedNode = id;
if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
}
};

// Toggle Open or close
dTree.prototype.o = function(id) {
var cn = this.aNodes[id];
this.nodeStatus(!cn._io, id, cn._ls);
cn._io = !cn._io;
if (this.config.closeSameLevel) this.closeLevel(cn);
if (this.config.useCookies) this.updateCookie();
};

// Open or close all nodes
dTree.prototype.oAll = function(status) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {
this.nodeStatus(status, n, this.aNodes[n]._ls)
this.aNodes[n]._io = status;
}
}
if (this.config.useCookies) this.updateCookie();
};

// Opens the tree to a specific node
dTree.prototype.openTo = function(nId, bSelect, bFirst) {
if (!bFirst) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].id == nId) {
nId=n;
break;
}
}
}
var cn=this.aNodes[nId];
if (cn.pid==this.root.id || !cn._p) return;
cn._io = true;
cn._is = bSelect;
if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);
if (this.completed && bSelect) this.s(cn._ai);
else if (bSelect) this._sn=cn._ai;
this.openTo(cn._p._ai, false, true);
};

// Closes all nodes on the same level as certain node
dTree.prototype.closeLevel = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) {
this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}

// Closes all children of a node
dTree.prototype.closeAllChildren = function(node) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {
if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);
this.aNodes[n]._io = false;
this.closeAllChildren(this.aNodes[n]);
}
}
}

// Change the status of a node(open or closed)
dTree.prototype.nodeStatus = function(status, id, bottom) {
eDiv = document.getElementById('d' + this.obj + id);
eJoin = document.getElementById('j' + this.obj + id);
if (this.config.useIcons) {
eIcon = document.getElementById('i' + this.obj + id);
eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;
}
eJoin.src = (this.config.useLines)?
((status)?((bottom)?this.icon.minusBottom:this.icon.minus):((bottom)?this.icon.plusBottom:this.icon.plus)):
((status)?this.icon.nlMinus:this.icon.nlPlus);
eDiv.style.display = (status) ? 'block': 'none';
};


// [Cookie] Clears a cookie
dTree.prototype.clearCookie = function() {
var now = new Date();
var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
this.setCookie('co'+this.obj, 'cookieValue', yesterday);
this.setCookie('cs'+this.obj, 'cookieValue', yesterday);
};

// [Cookie] Sets value in a cookie
dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) {
document.cookie =
escape(cookieName) + '=' + escape(cookieValue)
+ (expires ? '; expires=' + expires.toGMTString() : '')
+ (path ? '; path=' + path : '')
+ (domain ? '; domain=' + domain : '')
+ (secure ? '; secure' : '');
};

// [Cookie] Gets a value from a cookie
dTree.prototype.getCookie = function(cookieName) {
var cookieValue = '';
var posName = document.cookie.indexOf(escape(cookieName) + '=');
if (posName != -1) {
var posValue = posName + (escape(cookieName) + '=').length;
var endPos = document.cookie.indexOf(';', posValue);
if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));
else cookieValue = unescape(document.cookie.substring(posValue));
}
return (cookieValue);
};

// [Cookie] Returns ids of open nodes as a string
dTree.prototype.updateCookie = function() {
var str = '';
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) {
if (str) str += '.';
str += this.aNodes[n].id;
}
}
this.setCookie('co' + this.obj, str);
};

// [Cookie] Checks if a node id is in a cookie
dTree.prototype.isOpen = function(id) {
var aOpen = this.getCookie('co' + this.obj).split('.');
for (var n=0; n<aOpen.length; n++)
if (aOpen[n] == id) return true;
return false;
};

// If Push and pop is not implemented by the browser
if (!Array.prototype.push) {
Array.prototype.push = function array_push() {
for(var i=0;i<arguments.length;i++)
this[this.length]=arguments[i];
return this.length;
}
};
if (!Array.prototype.pop) {
Array.prototype.pop = function array_pop() {
lastElement = this[this.length-1];
this.length = Math.max(this.length-1,0);
return lastElement;
}
};

jsp 页面
<html>
<head>
<title>dtree</title>

<link rel="StyleSheet" href="dtree.css" type="text/css" />
<script type="text/javascript" src="dtree.js"></script>
</head>
<body>
<div class="dtree">

<p><a href="javascript: d.openAll();">open all</a> | <a href="javascript: d.closeAll();">close all</a></p>

<script type="text/javascript">
<!--
d = new dTree('d');

d.add(0,-1,'菜单权限树');
d.add(1,0,'authority','25','一级菜单1 ');
d.add(2,1,'authority','26','二级菜单1 ');
d.add(3,2,'authority','27','三级菜单1 ');
d.add(4,2,'authority','28','三级菜单2 ');

d.add(32,3,'authority','26','二级菜单1 ');
d.add(33,32,'authority','27','用户管理 ');
d.add(34,32,'authority','28','用户组管理 ');

d.add(22,1,'authority','26','二级菜单1 ');
d.add(23,22,'authority','27','用户管理 ');
d.add(24,22,'authority','28','用户组管理 ');

d.add(6,0,'authority','25','一级菜单2 ',true,true);
d.add(7,6,'authority','26','二级菜单2 ',true,true);
d.add(8,7,'authority','27','用户管理 ',true,true);
d.add(9,7,'authority','28','用户组管理 ',true,true);


d.add(11,0,'authority','25','一级菜单3 ');
d.add(12,11,'authority','26','二级菜单3 ');
d.add(13,12,'authority','27','用户管理 ');
d.add(14,12,'authority','27','用户组管理 ');

document.write(d);

d.openAll();
//-->
</script>

</div>
<div>
<input type='button' name='bTest' value='test' onclick='test();'>
</div>
</body>
<script type="text/javascript">
<!--
function test(){
var count = 0;
var obj = document.all.authority;

for(i=0;i<obj.length;i++){
if(obj[i].checked){
alert(obj[i].value);
count ++;
}
}
}
//-->
</script>
</html>