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"; 
  }
}
}