function showTab(obj,tag1,tag2){
	//set source container class
	var pp_node = obj.parentNode.parentNode;
	for(var i=0; i<pp_node.childNodes.length; i++){
		if(pp_node.childNodes[i].tagName == "LI")
			pp_node.childNodes[i].className = "";
	}
	obj.parentNode.className = "current";

	//set target container class
	var tag1 = document.getElementById(tag1);        //讀取tag1的數據
	var tag1_pnode = tag1.parentNode;                //將tag1放到程式
	for(var i=0; i<tag1_pnode.childNodes.length; i++){
		if(tag1_pnode.childNodes[i].tagName=="LI")
			tag1_pnode.childNodes[i].className = "";
	}
  tag1.className = "current";                      //讀取tag1 class 名稱

 	var tag2 = document.getElementById(tag2);        //讀取tag2的數據
	var tag2_pnode = tag2.parentNode;                //將tag2放到程式
	for(var i=0; i<tag2_pnode.childNodes.length; i++){
		if(tag2_pnode.childNodes[i].tagName=="LI")
			tag2_pnode.childNodes[i].className = "";
	}
	tag2.className = "ent";                          //讀取tag2 class 名稱
}


//2
function showTab2(obj,tag1){
	//set source container class
	var pp_node = obj.parentNode.parentNode;
	for(var i=0; i<pp_node.childNodes.length; i++){
		if(pp_node.childNodes[i].tagName == "LI")
			pp_node.childNodes[i].className = "";
	}
	obj.parentNode.className = "current";

	//set target container class
	var tag1 = document.getElementById(tag1);        //讀取tag1的數據
	var tag1_pnode = tag1.parentNode;                //將tag1放到程式
	for(var i=0; i<tag1_pnode.childNodes.length; i++){
		if(tag1_pnode.childNodes[i].tagName=="LI")
			tag1_pnode.childNodes[i].className = "";
	}
  tag1.className = "current";
  }