function getElementsByClassName(className) {
  var allElements = (document.all) ? document.all : document.getElementsByTagName("*");
  var results = new Array();
  var re = new RegExp("\\b" + className + "\\b");
  for (var i = 0; i < allElements.length; i++) {
    if (re.test(allElements[i].className)) {
      results.push(allElements[i]);
    }
  }
  return results;
}