代码如下，如何点击叶子节点会打开一个自定义的链接地址呢？最好在新窗体中打开。谢谢。
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN ">
<HTML>
<HEAD>
<TITLE> DSTree </TITLE>
<style>
body,td{font:12px verdana}
#treeBox{background-color:#fffffa;}
#treeBox .ec{margin:0 5 0 5;}
#treeBox .hasItems{font-weight:bold;height:20px;padding:3 6 0 6;margin:2px;cursor:hand;color:#555555;border:1px solid #fffffa;}
#treeBox .Items{height:20px;padding:3 6 0 6;margin:1px;cursor:hand;color:#555555;border:1px solid #fffffa;}
</style>
<script>
//code by star 20003-4-7
var HC = "color:#990000;border:1px solid #cccccc ";
var SC = "background-color:#efefef;border:1px solid #cccccc;color:#000000; ";
var IO = null;
function initTree(){
var rootn = document.all.menuXML.documentElement;
var sd = 0;
document.onselectstart = function(){return false;}
document.all.treeBox.appendChild(createTree(rootn,sd));
}
function createTree(thisn,sd){
var nodeObj = document.createElement( "span ");
var upobj = document.createElement( "span ");
with(upobj){
style.marginLeft = sd*10;
className = thisn.hasChildNodes()? "hasItems ": "Items ";
innerHTML = " <img src=d:/expand.gif class=ec> " + thisn.getAttribute( "text ") + " ";
onmousedown = function(){
if(event.button != 1) return;
if(this.getAttribute( "cn ")){
this.setAttribute( "open ",!this.getAttribute( "open "));
this.cn.style.display = this.getAttribute( "open ")? "inline ": "none ";
this.all.tags( "img ")[0].src = this.getAttribute( "open ")? "d:/expand.gif ": "d:/contract.gif ";
}
if(IO){
IO.runtimeStyle.cssText = " ";
IO.setAttribute( "selected ",false);
}
IO = this;
this.setAttribute( "selected ",true);
this.runtimeStyle.cssText = SC;
}
onmouseover = function(){
if(this.getAttribute( "selected "))return;
this.runtimeStyle.cssText = HC;
}
onmouseout = function(){
if(this.getAttribute( "selected "))return;
this.runtimeStyle.cssText = " ";
}
oncontextmenu = contextMenuHandle;
onclick = clickHandle;
}
if(thisn.getAttribute( "treeId ") != null){
upobj.setAttribute( "treeId ",thisn.getAttribute( "treeId "));
}
if(thisn.getAttribute( "href ") != null){
upobj.setAttribute( "href ",thisn.getAttribute( "href "));
}
if(thisn.getAttribute( "target ") != null){
upobj.setAttribute( "target ",thisn.getAttribute( "target "));
}
nodeObj.appendChild(upobj);
nodeObj.insertAdjacentHTML( "beforeEnd ", " <br> ")