// JavaScript Document
function fetch_object(idname)
{
    var my_obj = document.getElementById(idname);
    return my_obj;
}

function menu(obj,zu,num) //选项卡切换(卡序号,组号,组内卡数)
{ 
 for (i = 1; i<= num; i++)
 {        
	var my_menu = fetch_object("menu"+ zu +"_" + i);
	var my_card = fetch_object("card"+ zu +"_" + i);
	if (obj == i)
	{
		if(my_card.style.display != "block")
		{
		my_menu.className = "Liover";
		my_card.style.display = "block";
		}
	}else{
	 	if (my_card.style.display != "none")
		{
		my_menu.className = "";
		my_card.style.display = "none";
		}
	}	
 }
}