var DHTML=(document.getElementById || 
           document.all || 
           document.layers);
var sub2;
var sub7;
var sub6;
var sub3;
var showTmp;

function init() {
 sub2=new getObj('menu22_sub');
 sub7=new getObj('menu7_sub');
 sub6=new getObj('menu6_sub');
 sub3=new getObj('menu3_sub');
}

function show(name) {
 if(!DHTML) {
  return;
 }
 sub2.style.display='none';
 sub7.style.display='none';
 sub6.style.display='none';
 sub3.style.display='none';
 if(name.length>2) {
  clearTimeout(showTmp);
  var num=name.charAt(4);

   switch(num) {
   case "2": 
    sub2.style.display='block';
    break;
   case "7": 
    sub7.style.display='block';
    break;
   case "6": 
    sub6.style.display='block';
    break;
   case "3": 
    sub3.style.display='block';
    break;
  }
 }
}

function showDir(name) {
 showTmp=window.setTimeout('show(0)',500);
}

function getObj(name) {
 if(document.getElementById) {
  this.style=document.getElementById(name).style;
 } else if(document.all) {
  this.style=document.all[name].style;
 } else if(document.layers) {
  this.style=document.layers[name];
 }
}