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";
      }
    } 
    }