function tree(searchName,idName) {
  idName = 'tree_' + idName;
  addTagForTree(searchName, idName);
}
function tree(searchName) {
  var idName = searchName.replace(' ','');
  idName = 'tree_' + idName;
  addTagForTree(searchName, idName);
}

function addTagForTree(searchName, idName) {
  var h2 = document.getElementsByTagName('h2');
  for (i = 0, len = h2.length; i < len; i++) {
    if (h2[i].innerHTML == searchName) {
      var par = h2[i].parentNode;
      var ul = par.getElementsByTagName('ul');
      var div = document.createElement('div');
      div.setAttribute('id', idName);
      div.appendChild(ul[0]);
      par.appendChild(h2[i]);
      par.appendChild(div);
      generateTreeForTreeStructure(idName);
      return;
    }
  }
}

function treeMaker() {
  tree('Recent Comments');
  tree('Recent Trackbacks');
  tree('categories');
}