function open_window(url)
{
    foto= window.open(url,"foto","width=600,height=400,toolbar=no,directories=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no");
}

function open_window2(url)
{
    foto= window.open(url,"foto","width=600,height=500,toolbar=no,directories=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes");
}