JavaScript Simple Zen Decoder

zenDecoder.js

function zenDecode (str) {
    var
      tokenStr = str.replace(/\s/g, ''),
      fragment = document.createDocumentFragment(),
      zenStack = tokenStr.split('>').reverse();

    console.log(tokenStr);
    return (zenTokenize(zenStack, fragment));
  }

  function zenTokenize (arr, parent) {
    var
      source = arr.pop(),
      next,
      pureSource = source.split('*'),
      pureStr = pureSource[0],
      interation = pureSource[1] || 1,
      elem,
      i = 0;

    for(; i < interation; i++){
      elem = zenParse(pureStr, parent);
      if(arr.length) {
        next = arr.slice(0);
        zenTokenize(next, elem);
      }
    }
    return parent;
  }

  function zenParse (tokens, parent) {
    var
      reg = /([a-z0-9]+)(#[a-z0-9]+){0,1}((\.[a-z0-9]+)*)(\[[a-z0-9]+\]){0,1}/i,
      elem,
      tokenArr = tokens.split('+');

    tokenArr.forEach(function (token) {
      var
        obj = reg.exec(token);

      elem = makeDom(obj);
      parent.appendChild(elem);
    });
    return elem;
  }

  function makeDom (arr) {
    var
      elem = document.createElement(arr[1]);
    if (arr[2]) elem.id = arr[2];
    if (arr[3]) elem.setAttribute('class', arr[3].replace('.', ' '));
    if (arr[5]) elem.textContent = arr[5];
    return elem;
  }
  // Trest Code
  
  var zenTest = "div#contents > ul#videoList > li.videoList*9 > h2.videoTitle + p.description[this is list]";
  console.log('zen test start');
  document.body.appendChild(zenDecode(zenTest));