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

changemenu=function(obj,zu,num){ 
	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";
			}
		}	
	}
}