function scambio(id, risultati, iframe)
{
    if (document.getElementById)
    {
        if(document.getElementById(id).style.display == 'none')     
        {   
            document.getElementById(id).style.display = 'block';                
            
            document.getElementById(risultati).style.display = 'none';
            
            if(document.getElementById(iframe).style.display == 'none')     
            {   
                document.getElementById(iframe).style.display = 'block';    
            }
        }
        else 
        {   
            document.getElementById(id).style.display = 'none';                 
            /*window.location = "index.php";*/
        }
    }
}


/* ------------------------------------ */
function scambio1(id1, risultati, iframe)
{
    if (document.getElementById)
    {
        if(document.getElementById(id1).style.display == 'none')        
        {   
            document.getElementById(id1).style.display = 'block';               document.getElementById(risultati).style.display = 'none';
            if(document.getElementById(iframe).style.display == 'none')     {   document.getElementById(iframe).style.display = 'block';    }
        }
        else 
        {   
            document.getElementById(id1).style.display = 'none';                
            window.location = "libri.php";
            /*
            document.getElementById(risultati).style.display = 'block';
            if(document.getElementById(iframe).style.display == 'block')    {   document.getElementById(iframe).style.display = 'none'; }
            */
        }
    }
}
/* ------------------------------------ */
function schedaLibro(id)
{
    window.open("scheda_libro.php?id="+ id, '_top');
}