Bmail联系人飞来飞去效果

好久没来了。本来想利用此贴写一些关于表现，行为和结构分离的东西，但是一直没什么时间，而且这段代码写的很匆忙，所以只好另找时间了。代码在IE6,Firefox1.7,Opera9下运行了一下应该没什么错误，如果有什么问题的话希望大家可以提出来。
其中fly函数块借鉴了Bmail的代码

博客邮箱飞来飞去效果演示

var ev={};
var flyDiv="bxAddrFly";//发送的层
var inceptDiv="SendAddress";//负责接收层效果的控件
var addEvent="addAddress()";//层发送成功后的接收事件
function oo(obj){return (document.getElementById) ? document.getElementById(obj): document.all[obj];}
function isNone(str){return str==null||str==""?true:false}

//=================兼容Firefox/Event=================
//因为要将表现与行为分离所在此处浪费了很多代码
var Browser = new Object();
Browser.isFirefox = (navigator.userAgent.toLowerCase().indexOf("firefox")!=-1);
if (Browser.isFirefox) { extendEventObject();}
function extendEventObject() {

window.constructor.prototype.__defineGetter__("event", function(){
var o = arguments.callee.caller;
var e;
while(o != null){
e = o.arguments[0];
if(e && (e.constructor == Event || e.constructor == MouseEvent)) return e;
o = o.caller;
}
return null;
});

Event.prototype.__defineGetter__("srcElement", function () {
var node = this.target;
while (node.nodeType != 1) node = node.parentNode;
return node;
});
}

window.onload = function(){
var addrTree = oo('tbAddrTree');
addrTree.onmouseover = function(){addrTree_event(event)};
addrTree.onmouseout = function(){addrTree_event(event)};
addrTree.onclick = function(){addrTree_event(event)};
}

function addrTree_event(e){
var memberID,tr
var ee = e.srcElement;
if(ee.tagName=="A"&&e.type=="mouseover"){ee.style.textDecoration="underline"}
if(ee.tagName=="A"&&e.type=="mouseout"){ee.style.textDecoration=""}
if(e.type=="click"&&e.srcElement.tagName=="A"){
var li=ee.parentNode.parentNode;
ev.AddInfo="\""+li.getAttribute("memberName")+"\""
oo(flyDiv).innerHTML=li.getAttribute("memberName");
addrTree_add(e.clientX,e.clientY)
}
}

function addrTree_add(ex,ey){
if(oo(flyDiv).style.display=='none'){oo(flyDiv).style.display=''}
//此处获取控件的坐标
var inceptE = oo(inceptDiv);
var inceptEX = inceptE.offsetTop;
var inceptEY = inceptE.offsetLeft;
while(inceptE = inceptE.offsetParent){
inceptEX += inceptE.offsetTop;
inceptEY += inceptE.offsetLeft;
}
ev.flyArr=new Array(ex,ey,inceptEX,inceptEY,10);
fly(flyDiv,addEvent);
}

//
function fly(flyObj,flyRun){
var obj,a=ev.flyArr,x,y

if(flyObj!=null){
if(ev.flyObj!=null){
window.clearTimeout(ev.flyTm);
ev.flyObj.style.top=-900;
}
a[5]=0;
ev.flyObj=oo(flyObj);
ev.flyRun=flyRun;
}

obj=ev.flyObj;
if(a[4]==null){a[4]=1}
a[5]+=a[4]/Math.sqrt(Math.pow(a[2]-a[0],2)+Math.pow(a[3]-a[1],2));
if(a[5]>1){
obj.style.top=-900;
eval(ev.flyRun);
ev.flyObj=null;
return;
}

window.clearTimeout(ev.flyTm);
x=(a[2]-a[0])*a[5]+a[0];
y=(a[3]-a[1])*a[5]+a[1];
obj.style.left=x;
obj.style.top=y;
document.body.style.overflowX="hidden";
ev.flyTm=window.setTimeout("fly()",10)
}

//事件处理
function addAddress()
{
var key=ev.AddInfo;
if (oo(inceptDiv).value.indexOf(key)==-1)
{
oo(inceptDiv).value+=key+",";
}
}

ul{ list-style:none; margin:0; padding:0;}
li{ margin:0; padding:0;}
#content{width:100%;}
#sendmail{float:left; width:60%;}
#friendlist{float:left; width:30%;}
#bxAddrFly{position:absolute;height:15px; width:50px;background:#e5edf6; border:1px #7F9DB9 solid;}
#tbAddrTree{ width:190px; float:left; padding:4px;border:1px #7F9DB9 solid;}
#tbAddrTree li{ width:100%; float:left;}
#tbAddrTree a{backgroud: #fff;width: 100%;color:#494949;text-decoration: none;float:left;}
#tbAddrTree a:hover{background: #e5edf6}

• test0
• test1
• test2
• test3
• test4
• test5
• test6
• test7

[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]