function nTabs(thisObj,Num){
if(thisObj.className == "tagselected")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 = "tagselected"; 
   document.getElementById(tabObj+"_Content"+i).style.display = "block";

  }else{

   tabList[i].className = "tagunselected"; 
   document.getElementById(tabObj+"_Content"+i).style.display = "none";
  	  }
   } 
}

//切换图像并换div
function contab(numid)
{
for(i=0;i<6;i++)
	{ 
	  document.getElementById("contagul_Content"+i).style.display = "none";
	}
	document.getElementById("contagul_Content"+numid).style.display = "block";
}