高手请进，阿赖实用javascript控件如何实现点击横向菜根节点超链接问题

高手请进，阿赖实用javascript控件如何实现点击横向菜根节点超链接问题
<script>
function guidbar()
{
var bar=this
bar.item=[]
var imgBall0=new Image
var imgBall1=new Image
imgBall0.src="images/ball.gif"
imgBall1.src="images/ball2.gif"
bar.add=function(Text,mnu)
{
var item=document.createElement("span")
tdGuid.insertAdjacentElement("beforeEnd",item)
var img=new Image
img.src=imgBall0.src
item.insertAdjacentElement("beforeEnd",img)
var lnk=document.createElement("span")
item.insertAdjacentElement("beforeEnd",lnk)
lnk.innerText=Text
lnk.className="guidlink"
item.style.cssText="cursor:default;margin-left:10;font-size:11pt;width:100;heigth:24"
bar.item[bar.item.length]=item
item.onmouseover=function()
{
document.body.click()
if(mnu!=null)mnu.show(item)
var img=document.all[item.sourceIndex+1]
img.src=imgBall1.src
this.style.color="blue"
}
item.onmouseout=function()
{
var img=document.all[item.sourceIndex+1]
img.src=imgBall0.src
this.style.color="black"
}
return item
}
}
var mnu1=new alai_menu_xp()
mnu1.addLink("readme.htm","教程和程序使用说明","_self")
mnu1.addLink("http://www.9499.net?go=downtc","下载程序和教程")var g1=new guidbar()
g1.add("主菜单",mnu1)
g1.add("表格控件1",m_tc)
//-----------------------------------以下是我实现不了出来的，请大家帮忙看一下---------为什么不对
g1.addLink("此节点下没有子节点，想点击后弹出一个页来","","url","http://www.baidu.com")
</script>