var x = 20;
var y = 70;
var lastmenu = null;
function setVisible(obj)
{
    if (lastmenu) 
    {
      setInvisible(lastmenu);
    }
    //var active=$$('.horizontal_accordion_toggle_active');
    //var box=active[0].next();
    var box=$('horizontal_container');
    $(obj).absolutize();
    $(obj).clonePosition(box);
    lastmenu = obj;
    //obj = document.getElementById(obj);
    $(obj).setStyle(
    {
        visibility: 'visible'
    });
}
function setInvisible(obj)
{
    //obj = document.getElementById(obj);
    $(obj).setStyle(
    {
        visibility: 'hidden'
    });
}