javascript 树形菜单

1. [代码][JavaScript]代码     
var ME={
ini:{i:true,d:{},d1:{},h:0,h1:0,h2:0},
html:function(da,f){
var s='';
for(var i=0,l=da.length;i if(typeof(da[i].pid)=='object'){
s+='

'+da[i].ming+'';
this.ini.i=false;
s+=this.html(da[i].pid,(i+1==l));
}else{
s+='

'+da[i].ming+'';
}
s+='

';
}
s+='';
return s;
},
st:function(id,da){
document.getElementById(id).innerHTML=this.html(da);
},
yc:function(a){
var s=a.className.substr(1);
if(s%2){
this.ini.d=a.parentNode.children[2];
this.ini.h1=this.hei(this.ini.d);
this.ini.h3=this.ini.h1/10;
this.yc1(1);
a.className='s'+(parseInt(s)+1);
a.parentNode.children[1].children[0].className='r2';
var ol=a.parentNode.parentNode._;
if(typeof(ol)=='object'){
this.ini.d1=ol;
this.ini.h=ol.offsetHeight;
this.ini.h2=this.ini.h/10;
this.yc2(1);
ol.parentNode.children[0].className='s'+(parseInt(ol.parentNode.children[0].className.substr(1))-1);
ol.parentNode.children[1].children[0].className='r1';
}
a.parentNode.parentNode._=a.parentNode.children[2];
}else{
this.ini.d1=a.parentNode.children[2];
this.ini.h=this.ini.d1.offsetHeight;
this.ini.h2=this.ini.h/10;
this.yc2(1);
a.className='s'+(parseInt(s)-1);
a.parentNode.children[1].children[0].className='r1';
a.parentNode.parentNode._='';
}
},
yc1:function(b){
var h1=ME.ini.h1-(11/(b+1)-1)*ME.ini.h3;
with(ME.ini.d.style){
height=h1+'px';
display='block';
}
if(b<10){
setTimeout('ME.yc1('+(b+1)+')',25);
}else{
ME.ini.d.style.display='block';
ME.ini.d.style.height='';
}
},
yc2:function(b){
var h1=(11/(b+1)-1)*ME.ini.h2;
with(ME.ini.d1.style){
height=h1+'px';
}
if(b<10){
setTimeout('ME.yc2('+(b+1)+')',25);
}else{
ME.ini.d1.style.display='';
ME.ini.d1.style.height='';
}
},
hei:function(a){
var b=a.cloneNode(true);
b.style.position='absolute'; 
b.style.display='block'; 
b.style.visibility='hidden';
a.parentNode.appendChild(b);
var h=b.offsetHeight;
a.parentNode.removeChild(b);
return h;
}
}