function popupFlash(magazine){
var x = parseInt(screen.width / 2.0) - (900 / 2.0);
var y = parseInt(screen.height / 2.0) - (663 / 2.0);
var win = window.open("turn_page/index.php?magazine=" + magazine, "revista", "top=" + y + ",left=" + x + ",scrollbars=no,dialog=yes,minimizable=no,modal=yes,width=900,height=663,resizable=no");
}