function launchCenter(width, height) {
  if (window.screen) {
    if (height > screen.availHeight)
      height = screen.availHeight - 50;
    if (width > screen.availWidth)
      width = screen.availWidth - 30;
  }
  var str = "height=" + height + ",innerHeight=" + height;
  str += ",width=" + width + ",innerWidth=" + width;
  if (window.screen) {
    var ah = screen.availHeight - 30;
    var aw = screen.availWidth - 10;

    var xc = (aw - width) / 2;
    var yc = (ah - height) / 2;

    str += ",left=" + xc + ",screenX=" + xc;
    str += ",top=" + yc + ",screenY=" + yc;
  }
  return str;
}

function picview(pic, w, h) {
	if (!w) w = 270;
	if (!h)	h = 135;
	
	w += 5;
	h += 5;
	
	picwin = window.open(pic, "picwin", "scrollbars=no,resizable=no," + launchCenter(w, h));
	setTimeout("picwin.focus();", 250);
}