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----  我有个avaScript的下来菜单 如何在一张页面里多次使用它  (http://bbs.xml.org.cn/dispbbs.asp?boardid=43&rootid=&id=50012)

--  作者：zx147
--  发布时间：7/16/2007 3:00:00 PM

--  我有个avaScript的下来菜单 如何在一张页面里多次使用它
我有个avaScript的下来菜单 如何在一张页面里多次使用它？
放进一个页面不同位置的时候 有冲突，，该怎么改？？
求大虾们帮帮忙
下面是那个菜单的代码
<html>
<head>
<title>QQ菜单</title>
<meta http-equiv='Content-Type' content='text/html; charset=gb2312'>
<script language='JavaScript'>
var headHeight = 22;var bodyHeight = 202;var objcount = 3;var step = 20;var moving = false;
function showme(obj1, obj2)
{
if (moving)
  return;
moving = true;
for(i=0;i<document.all.tags('td').length;i++)
  if (document.all.tags('td')[i].className.indexOf('headtd') == 0)
   document.all.tags('td')[i].className = 'headtd1';
obj2.className = 'headtd2';
moveme(obj1);
}
function moveme(obj)
{
idnumber = parseInt(obj.id.substr(4));
objtop = headHeight * (idnumber - 1);
objbuttom = bodyHeight + headHeight * (idnumber - 2);
currenttop = parseInt(obj.style.top);
if (currenttop >= objbuttom)
{
  countid = 1;
  for(i=0;i<document.all.tags('div').length;i++)
   if (document.all.tags('div')[i].id == 'item'+countid+'body')
   {
    obj = document.all.tags('div')[i];
    objtop = headHeight * (countid - 1);
    if (countid == idnumber)
    {
     moveup(obj,objtop,false);
     break;
    }
    else
     moveup(obj,objtop,true);
    countid++;
   }
}
else if ((currenttop <= objtop) && (idnumber < objcount))
{
  idnumber++;
  countid = objcount;
  for(i=document.all.tags('div').length-1;i>=0;i--)
   if (document.all.tags('div')[i].id == 'item'+countid+'body')
   {
    obj = document.all.tags('div')[i];
    objbuttom = bodyHeight + headHeight * (countid - 2);
    if (countid == idnumber)
    {
     movedown(obj,objbuttom,false);
     break;
    }
    else
     movedown(obj,objbuttom,true);
    countid--;
   }
}
}
function moveup(obj,objtop,ismove)
{
currenttop = parseInt(obj.style.top);
if (currenttop > objtop)
{
  obj.style.top = currenttop - step;
  setTimeout('moveup('+obj.id+','+objtop+','+ismove+')',1)
  return;
}
moving = ismove;
}
function movedown(obj,objbuttom,ismove)
{
currenttop = parseInt(obj.style.top);
if (currenttop < objbuttom)
{
  obj.style.top = currenttop + step;
  setTimeout('movedown('+obj.id+','+objbuttom+','+ismove+')',1)
  return;
}
moving = ismove;
}
</script>
</script>
<style type='text/css'>
.headtd1 {  background: #ADADAD; border: 2px outset; border-color: #D8D8D8 #FFFFFF #FFFFFF #D8D8D8; cursor: hand; font-size: 9pt}.headtd2 {  background: #CCCCCC; border: 2px outset; border-color: #FFFFFF #FFFFFF #FFFFFF #FFFFFF; cursor: hand; font-size: 9pt}.bodytd  {  background: #BBBFCE; border: 2px outset; border-color: #FFFFFF #FFFFFF #FFFFFF #FFFFFF; font-size: 9pt}
</style>
</head>
<body bgcolor='#FFFFFF' text='#000000'>
<div id='mainboard' style='position:absolute; left:2px; top:2px; width:120px; height:246px; z-index:1; overflow: hidden; background: #BBBFCE;'>
<div id='item1body' style='position:absolute; left:0; top:0; width:120px; height:202px; z-index:2; overflow: hidden'><table width='100%' border='0' height='100%' cellpadding='2' cellspacing='0'><tr><td id='item1head' height='20' class='headtd2' onclick='showme(item1body,this)' align='center'>菜单1</td></tr><tr><td class='bodytd' align='center'>test</td></tr></table></div><div id='item2body' style='position:absolute; left:0; top:202; width:120px; height:202px; z-index:3; overflow: hidden'><table width='100%' border='0' height='100%' cellpadding='2' cellspacing='0'><tr><td id='item2head' height='20' class='headtd1' onclick='showme(item2body,this)' align='center'>菜单2</td></tr><tr><td class='bodytd' align='center'>test</td></tr></table></div><div id='item3body' style='position:absolute; left:0; top:224; width:120px; height:202px; z-index:4; overflow: hidden'><table width='100%' border='0' height='100%' cellpadding='2' cellspacing='0'><tr><td id='item3head' height='20' class='headtd1' onclick='showme(item3body,this)' align='center'>菜单3</td></tr><tr><td class='bodytd' align='center'>test</td></tr></table></div></body></html>
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