function pop(url,params){
if(window.popw && window.popw.closed==false){
    popw.close();
 }
    popw= window.open(url,'pp',params);
}



function apri(quale) {
window.open(quale, 'pop', 'toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,scrolling=0,height=510,width=450')
}

function aprismall(quale) {
window.open(quale, 'pop', 'toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,scrolling=0,height=100,width=200')
}