function openpopup(popurl,w,h){
  sx=(screen.width-w)/2;
  sy=(screen.height-h)/2;
  opt="width=" + w + ",height=" + h + ",ScreenX=" + sx + ",ScreenY=" + sy + ",left=" + sx + ",top=" + sy + "toolbar=0,location=0,directories=0,status=0,scrollbars=1,menubar=0,resizable=1";
  nw=window.open(popurl,"wwww",opt);
}

function imgpopup(popurl,w,h){
  sx=(screen.width-w)/2;
  sy=(screen.height-h)/2;
  w+=20
  h+=30
  opt="width=" + w + ",height=" + h + ",ScreenX=" + sx + ",ScreenY=" + sy + ",left=" + sx + ",top=" + sy + "toolbar=0,location=0,directories=0,status=0,scrollbars=0,menubar=0,resizable=0";
  nw=window.open(popurl,"wwww",opt);
}