function set_menu (n, t) {
   if ( n == 0 ) {
      document.getElementById ('menu0').className = 'MenuActiu';
   } else {
      document.getElementById ('menu0').className = 'Menu';
   }
   if ( n == 1 ) {
      document.getElementById ('menu1').className = 'MenuActiu';
   } else {
      document.getElementById ('menu1').className = 'Menu';
   }
   if ( n == 2 ) {
      document.getElementById ('menu2').className = 'MenuActiu';
   } else {
      document.getElementById ('menu2').className = 'Menu';
   }
   document.getElementById ('titolText').innerHTML = t;
}

function win_show (quin) {
   switch (quin) {
      case 'info':
         document.getElementById ('avis').style.visibility = 'hidden';
         document.getElementById ('info').style.visibility = 'visible';
         break;
      case 'avis':
         document.getElementById ('info').style.visibility = 'hidden';
         document.getElementById ('avis').style.visibility = 'visible';
         break;
   }
}