function toggle(eID) {
  var el = $(eID);
  
  var cls = el.className;
  
  if (cls.indexOf(' hidden') != -1) {
    cls = cls.replace(' hidden', '');
  } else {
    cls += ' hidden';
  }
  el.className = cls;
}

function atoggle(eID, ans) {
  // get current state
  var el = $('l'+ eID);
  var cur = el.className;
  
  // logick
  if (cur == 'q' && ans == 'n') {
    el.className = 'n';
  } else if (cur == 'q' && ans == 'y') {
    el.className = 'y';
  } else if ((cur == 'y' && ans == 'n') || (cur == 'n' && ans == 'y')) {
    el.className = 'q';
  }
}

function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1) 
      return element;

    elements.push(element);
  }

  return elements;
}