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