How to add querySelectorAll to ie7

ie7querySelectorAll.js

function querySelectorAll(el, query) {
  if (el.querySelectorAll) return el.querySelectorAll(query);

  var style = document.createStyleSheet();
  var q = query.replace(/\[for\b/gi, '[htmlFor').split(',');
  var results = [];
  for (var i = q.length; i--;) {
    style.addRule(q[i], 'k:v');
    for (var j=el.all.length; j--;) {
      el.all[j].currentStyle.k && results.push(el.all[j]);
    }
    style.removeRule(0);
  }
  return results;
}

I know I'm late to the party but this is an O(n^m) instead of an O(2n+m) as shown here:

function querySelectorAll(el, query) {
  if (el.querySelectorAll) return el.querySelectorAll(query);

  var style = document.createStyleSheet();
  var q = query.replace(/\[for\b/gi, '[htmlFor').split(',');
  var results = [];
  for (var i = q.length; i--; style.addRule(q[i], 'k:v'));
  for (var j=el.all.length; j--;) {
    el.all[j].currentStyle.k && results.push(el.all[j]);
  }
  for (var i = q.length; i--; style.removeRule(i));
  return results;
}

btw, nice little hack.

Best regards