function getLevel(selector){
  var q = selector.match(/#[\w\d]+/ig);
  var ids = q?q.length:0;
  q=selector.match(/\.[\w\d]+/ig);
  var classes = q?q.length:0;
  q=selector.match(/[\.#]{0}[\w\d]+/ig);
  var tags =  q?q.length:0;
  return [ids, classes, tags];
}

function compare(a,b){
  var levelA = getLevel(a),
  levelB=getLevel(b);
  for(var i =0; i<3;i++){
    if(levelA[i]!=levelB[i]){
      return levelA[i]>levelB[i]?a:b;
    }
  }
  return b;
}