function toggle() {
  var _collection = document.getElementsByTagName('div');
  for (var loop = 0, max = _collection.length; loop < max; loop++) {
    if (_collection[loop].className == "spec") {
      if (_collection[loop].style.color == "white") {
        _collection[loop].style.color = "black";
        _collection[loop].style.fontWeight = "normal";
		_collection[loop].style.backgroundColor = "white";
      } else {
        _collection[loop].style.color = "white";
        _collection[loop].style.fontWeight = "normal";
		_collection[loop].style.backgroundColor = "#CCCCCC";
      }
    }
  }
}