function popup_foto( url,w,h )
{

my_image = new Image();
my_image.src = name;


//w = my_image.width;
//h = my_image.height;



var x = (screen.width - w)/2;
var y = (screen.height - h)/2;


// da abilitare per didascalia
//height_dida = 0;
//if (dida!='') height_dida = 50;
//h = eval(my_image.height) + eval(height_dida);


var finestra=window.open(url,'_blank','width=' + w +',height=' + h + ', toolbar=no,directories=no,location=no,status=no,menubar=no,copyhistory=no,scrollbars=no,resizable=yes')
finestra.moveTo(x,y);


 }