//Apre una finestra page di dimensione dim
function open_win(page,dim)
{
		popup = window.open(page,"Ingrandimento","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=" + dim);
}
function open_win(page,dim,hy)
{
		popup = window.open(page,"Ingrandimento","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=" + dim + ",height=" + hy);
}
function open_win(page)
{
		popup = window.open(page,"Ingrandimento","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,left=1,top=1");
}