old_contents: // Copyright 2013 Patrick Wang kk1fff@patrickz.net
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  var mainIframe = document.querySelector("html.ext-strict body#ext-gen6.frameBody div.container div.mainpage iframe#middlearea");
  
  function resizeFrame(obj) {
    obj.style.height = obj.contentDocument.body.scrollHeight + 'px';
  }
  
  if (mainIframe) {
  //  mainIframe.setAttribute('scrolling', 'yes');
    resizeFrame(mainIframe);
  }
  
new_contents: // Copyright 2013 Patrick Wang kk1fff@patrickz.net
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  var mainIframe = document.querySelector("html.ext-strict body#ext-gen6.frameBody div.container div.mainpage iframe#middlearea");
  
  function resizeFrame(obj) {
    obj.style.height = obj.contentDocument.body.scrollHeight + 'px';
  }
  
  if (mainIframe) {
    mainIframe.setAttribute('scrolling', 'auto');
    resizeFrame(mainIframe);
  }
  
subject: set scroll to auto