function newWindow(page, W, H,scrollbars)
{
 	var w=window.screen.width;
  var h=window.screen.height;
  var X=X||Math.ceil((w-W)/2)
  var Y=Y||Math.ceil((h-H)/2)
  if (scrollbars == 0) 
  {
  	scrollbars = "no"
  }
  else
  {
  	scrollbars = "yes"
  }
  features = "width=" + W + ",height=" + H + ",menubar=no,location=no,scrollbars=" + scrollbars + ",left=" + X + ",top=" + Y;
  top.window_handle = window.open(page, 'Information', features);
}