var menu2liv = new Array('nws_2liv','sqd_2liv','cld_2liv','rsl_2liv');
var openMenuItem = '';

function menu_close()
{
    for (i=0; i<menu2liv.length; i++)
    {
        e = document.getElementById(menu2liv[i]);
        e.style.display = 'none';
    }
    openMenuItem = '';
}

//Menu principale
function menu_open(id) 
{
    // Nascondo tutti
    menu_close();
    // Apro quello che devo
    e = document.getElementById(id);
    e.style.display = 'block';
    openMenuItem = id;
}

function menu_switch(id)
{
    if (id == openMenuItem)
        menu_close();
    else
        menu_open(id);
}