function nTabs(thisObj,Num){
		if(thisObj.className == "active")return;
		var tabObj = thisObj.parentNode.id;
		var tabList = document.getElementById(tabObj).getElementsByTagName("SPAN");
		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";
			  }
			} 
		}