code: function getScriptElementContents(el) {
    if (!isElement(el)) {
      throw new TypeError('Expected a DOM Node, got ' + common.unexpectedObjToString(el));
    }
    if (el.type !== 'text/ohm-js') {
      throw new Error('Expected a script tag with type="text/ohm-js", got ' + el);
    }
    return el.getAttribute('src') ? load(el.getAttribute('src')) : el.innerHTML;
  }
docs: Return the contents of a script element, fetching it via XHR if necessary.