// 2nd menu
function menu(idx){
 for (i=1;i<=menuLen;i++){
  eval("document.getElementById('subMenu_"+i+"').style.display='none'");
 }
 eval("document.getElementById('subMenu_"+ idx +"').style.display='block'");
 document.getElementById('topMenu'+idx).className = "on";//alert(document.getElementById('topMenu'+idx).childNodes.item(0).childNodes.item(0));
 //var obj = document.getElementById('topMenu'+idx).childNodes.item(0).childNodes(0);
 var obj = document.getElementById('topMenu'+idx).childNodes.item(0).childNodes.item(0);
}

function menu2(idx){
 for (i=1;i<=menuLen;i++){
  eval("document.getElementById('subMenu_"+i+"').style.display='none'");
 }
 eval("document.getElementById('subMenu_"+ idx +"').style.display='none'");
 document.getElementById('topMenu'+idx).className = "";
//  var obj = document.getElementById('topMenu'+idx).childNodes.item(0).childNodes(0);
  var obj = document.getElementById('topMenu'+idx).childNodes.item(0).childNodes.item(0);
}