var win = null;
function newWindow(mypage) {
var w=1024;
var h=800;
var features = "resizable,scrollbars,status,toolbar";
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  if (winl < 0) winl = 0;
  if (wint < 0) wint = 0;
  var settings = 'height=' + h + ',';
  settings += 'width=' + w + ',';
  settings += 'top=' + wint + ',';
  settings += 'left=' + winl + ',';
  settings += features;
  win = window.open(mypage,"New",settings);
  win.window.focus();
}