function  show(id,on,id2) { 
var menu = document.getElementById(id);
var menu2 = document.getElementById(id2);
menu.style.display = "block"; 
on.className = "curr";
menu2.className = "curr"; 
}  

function hide (id,on,id2){
var menu = document.getElementById(id);
var menu2 = document.getElementById(id2);
menu.style.display = "none";
on.className = "";
menu2.className = "";
}