var newWindow= null;

function openNewQuizWindow( URL, winName, features ){
  var quizBase="/RocketFuel";
  var xPos = ( screen.width-700 )/2;
  var yPos = ( screen.height-600 )/2;
  features += ",top="+yPos;
  features += ",left="+xPos;
  newWindow=window.open( quizBase+"/"+URL, winName, features );
  //newWindow.moveTo( xPos, yPos );
  //newWindow.focus( );
}