function apri_artisti(url){
window.open(url,'artisti','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizeable=no,copyhistory=no,width=400,height=185,topmargin=0,leftmargin=0,marginwidth=0,marginheight=0');}

function apri_sponsor(url){
window.open(url,'sponsor','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizeable=no,copyhistory=no,width=375,height=400,topmargin=0,leftmargin=0,marginwidth=0,marginheight=0');}

function apri_principi(url){
window.open(url,'principi','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizeable=no,copyhistory=no,width=400,height=550,topmargin=0,leftmargin=0,marginwidth=0,marginheight=0');}