function spopup(name, x, y, newurl) {
  var L, T;
  var PicName;
  
  L = screen.width/2 - x/2;
  T = screen.height/2 - y/2;
  options="toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,height=" + y + ",width="+ x + ",top=" + T +",left=" + L;

  newwin = window.open(newurl, name, options);

}