function opCt(theURL,winName,winWidth,winHeight,features) {
  var w = (screen.width - winWidth)/2;
  var h = (screen.height - winHeight)/2 - 60;
  features = features+',width='+winWidth+',height='+winHeight+',top='+h+',left='+w;
  window.open(theURL,winName,features);
}