谁能用dtree.js解释这个data.js啊

Question

var a=new dtree('a','main')
a.addfolder('学生管理')
 a.addfolder('系统管理')
  a.addnode('登录','oldlogin1.html')
  a.addnode('注册','zhuce1.html')
  a.addnode('查看公告','listnotice.asp')
a.endfolder()
a.addfolder('课程学习')
  a.addnode('语文')
  a.addnode('数学')
  a.addnode('英语')
  a.addnode('文综')
  a.addnode('理综')
a.endfolder()
a.addfolder('留言版管理')
  a.addnode('管理中心','admin.asp')
a.endfolder()
a.addfolder('下载管理')
a.endfolder()
a.addnode('退出系统','logout.asp')
a.endfolder()
a.init()
a.expandall(true)

Answer 1

怎么解释？
需要dtree.js的格式.

Answer 2

是啊，我从书上找来一个，可总是报错，说是１９行，８３字符，未结束的字符传．帮忙给看看哪里有错啊？
var imgpath=["img/plus.gif","img/minus.gif","img/dot.gif"]
function dtree(obj,target,check)
{
 this.obj=obj
 this.target=target
 this.child=0
 this.node=0
 this.icon=[]
 this.showcheck=check
 this.html="<table id='deeptree' onselectstart='return false' cellspacing=0 cellpadding=0 border=0>"
 for(i=0;i<imgpath.length;i++)
  {
   var tem=new image()
   this.icon[i]=tem.src=imgpath[i]}
}
dtree.prototype.addfolder=function(txt,link,show)
{
  this.msg[this.node]=[txt,link?link:'']
  this.html+="<tr><td class='node'><img src='"+(show?this.icon[1]:this.icon[0])+"'
  id='img"+this.child+"' border=0 align='absmiddle' onclick='"+this.obj+".expand("+this.child+")'>
  <input type='checkbox' name='treefolder' onclick='"+this.obj+".checkall(this,"+this.child+")' style='display:"+(this.showcheck?'':'none')+"'>
  <span onmouseover='doover(this)' onmouseout='doout(this)' onmousedown='"+this.obj+".light(this,"+this.node+");"+this.obj+".expand("+this.child+")' 
  title='"+txt+"'>"+txt+"</span></td></tr>
<tr id='child"+this.child+"' style='display:"+(show?'':'none')+"'>
<td class='node'>" 
  this.html+="<table cellspacing=0 cellpadding=0 border=0 
  style='margin-left:18;'>"
this.child++
this.node++;
}dtree.prototype.addnode=function(txt,link)
{
   this.msg[this.node]=[txt,link?link:'']
   this.html+="<tr><td class='node'><img src='"+this.icon[2]+"' align='absmiddle' onclick='"+this.obj+".light(this.nextsibling.nextsibling,"+this.node+")'><input type='checkbox' name='treenode' onclick='"+this.obj+".parentcheck(this)' style='display:"+(this.showcheck?'':'none')+"'><span onmouseover='doover(this)' onmouseout='doout(this)' onmousedown='"+this.obj+".light(this,"+this.node+")' title='"+txt+"'>"+txt+"</span></td></tr>"
this.node++;
}
dtree.prototype.endfolder=function()
{
 this.html+="</table></td></tr>"}
dtree.prototype.expand=function(childnum,flag)
{
  var isexpand=document.getelementbyid("child"+childnum).style.display
  document.getelementbyid("img"+chilenum).src=isexpand=='none'?this.icon[1]:this.icon[0]
  document.getelementbyid("child"+chilenum).style.display=isexpand=='none'?'':'none'}
dtree.prototype.expandall=function(flag)
{
  if(this.child>0)
  for(i=0;i<this.child;i++)
{
  document.getelementbyid("img"+i).src=flag?this.icon[1]:this.icon[[0]
  document.getelementbyid("child"+i).style.display=flag?'':'none'}}
dtree.prototype.checkall=function(obj,childnum)
{
 obj.blur()
 var child=document.getelementbyid("child"+childnum)
 var nod=child.getelementsbytagname("input")
 for(i=0;i<node.length;i++)node[i].checked=obj.checked
 this.parentcheck(obj)
}
dtree.prototype.parentcheck=function(obj)
{
 obj.blur()
 for(i=this.chile-1;i>=0;i--)
{
  var checkparent=true
  var c=document.getelementbyid("child"+i)
  var node=c.getelementsbytagname("input")
  for(j=0;j<node.length;j++)if(!node[j].checked)checkparent=false
  document.getelementbyid("img"+i).nextsibling.checked=checkparent}}
dtree.prototype.getcheckedvalue=function()
{ 
   var valve[]
   var nod=document.getelementbyid('deeptree').getelementsbytagname("input")
   for(i=0;i<node.length;i++)if(node[i].checked&node[i].name=="treenode")value[value.length]=this.msg[i][0]
  return value}
dtree.prototype.init=function()
{
  this.html+=(this.node>0?"":"<tr><td>暂时没有数据</td></tr>")+"</table>"
  document.write(this.html)}
var tem=null
function doover(o){
o.classname='nodeover'}
function doout(o)
{
 o.classname=(tem==o?'nodefocus':'')}
dtree.prototype.light=function(o,nodenum)
{
 if(!tem)tem=o
tem.classname=''
o.classname='nodefocus'
tem=o
if(this.msg[nodenum][1])window.open(this.msg[nodenum][1],this.target);}