树形导航的JS代码(别人网站上的)

<script language='JavaScript' type='text/JavaScript'>
//树形导航的JS代码
var expandState = 0;
function expand(){
  if(expandState == 0){
    setPace('master', 0, 10, 10);
    if(ie){
      document.menutop.src = '/images/menui.gif'}; expandState = 1;
    }
   else{
      setPace('master', -200, 10, 10);
      if(ie){
        document.menutop.src='images/menuo.gif'
      }; 
   expandState = 0;}
}
document.write("<style type=text/css>#master {LEFT: -200px; POSITION: absolute; TOP: 25px; VISIBILITY: visible; Z-INDEX: 999}</style>")
document.write("<table id=master width='218' border='0' cellspacing='0' cellpadding='0'><tr><td><img border=0 height=6 src=images/menutop.gif  width=200></td><td rowspan='2' valign='top'><img id=menu onMouseOver=javascript:expand() border=0 height=70 name=menutop src=images/menuo.gif width=18></td></tr>");
document.write("<tr><td valign='top'><table width='100%' border='0' cellspacing='5' cellpadding='0'><tr><td height='400' valign='top'><table width=100% height='100%' border=1 cellpadding=0 cellspacing=5 bordercolor='#666666' bgcolor=#ecf6f5 style=FILTER: alpha(opacity=90)><tr>");
document.write("<td height='10' align='center' bordercolor='#ecf6f5'><font color=999900><strong>栏 目 树 形 导 航</strong></font></td></tr><tr><td valign='top' bordercolor='#ecf6f5'>");
document.write("<iframe width='100%' height='100%' src='ClassTree.asp' frameborder=0></iframe></td></tr></table></td></tr></table></td></tr></table>");
var ie = document.all ? 1 : 0
var ns = document.layers ? 1 : 0
var master = new Object('element')
master.curLeft = -200;   master.curTop = 10;
master.gapLeft = 0;      master.gapTop = 0;
master.timer = null;
if(ie){var sidemenu = document.all.master;}
if(ns){var sidemenu = document.master;}
setInterval('FixY()',100);
</script>

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