//pop-up help windows
function openPopUp(windowURL, windowName, windowWidth, windowHeight){
var winHandle = window.open(windowURL,windowName,"toolbar=no,status=yes,scrollbars=yes,resizable=yes,width=" + windowWidth + ",height=" + windowHeight)
  if(winHandle != null) winHandle.focus() //brings window to top
  return winHandle
}

//pop-up help windows with full browser chrome
function openPopUpFull(windowURL, windowName, windowWidth, windowHeight){
var winHandleFull = window.open(windowURL,windowName,"toolbar=yes,menubar=yes,location=yes,status=yes,scrollbars=yes,resizable=yes,width=" + windowWidth + ",height=" + windowHeight)
  if(winHandleFull != null) winHandleFull.focus() //brings window to top
  return winHandleFull
}

//error surpress
window.onerror=null