var curr = 0;
showitem = function(i){
  var item = $('jacp-item'+i);
  if((curr != i) && item) {
    var curritem = $('jacp-item'+curr);
    if(curritem){
      $('jacp-li'+curr).removeClass('active');
    }
    $('jacp-li'+i).addClass('active');
    var fx = new Fx.Elements([item, curritem]);
    var objs = {};
    objs[0] = {'opacity':[0,1]};
    objs[1] = {'opacity':[1,0]};
    fx.start(objs);
    curr = i;
  }
}
showfirst = function() {
  $$('.jacp-mainitem').each (function(item){
    item.setStyles({'opacity':0,'display':'block'});
  });
  var item = $('jacp-item'+curr);
  if(item) {
    item.setStyle('opacity',1);
    $('jacp-li'+curr).addClass('active');
  }
}