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"; 

          } 

        }  

      }