function nTabs(thisObj,Num){
if(thisObj.className == "active")return;
var tabObj = thisObj.parentNode.id;
var tabList = document.getElementById(tabObj).getElementsByTagName("li");
for(i=0; i <tabList.length; i++)
{
  if (i == Num)
  {
   thisObj.className = "active"; 
      document.getElementById(tabObj+"_Content"+i).style.display = "block";
  }else{
   tabList[i].className = "normal"; 
   document.getElementById(tabObj+"_Content"+i).style.display = "none";
  }
} 
}

function toggle(targetid,objN){
      var  target=document.getElementById(targetid);
   var aa=document.getElementById(objN)
 
            if (target.style.display=="block"){
                target.style.display="none";
    aa.innerHTML="<span id='off'>more Beijing Attractions</span>";
            } else {
                target.style.display="block";
    aa.innerHTML="<span id='on'>more Beijing Attractions</span>";
            }
}