Element parse function in javascript

gistfile1.js

ColladaFile.prototype._parseBindMaterial = function(parent, el) {
    for (var i = 0; i < el.childNodes.length; i++) {
      var child = el.childNodes[i];
      if (child.nodeType === 1) {
        switch (child.nodeName) {
          case "technique_common":
            this._parseBindMaterialTechnique(parent, child);
            break;
          default:
            this._reportUnexpectedChild(el, child);
        }
      }
    }
};