<div id="tree1"><ul id='tree1-treeData'>
                      <li id='tree1id1' title='Look, a tool tip!'>
                        item1 with key and tooltip
                      </li>
                      <li id='tree1id2'>
                        item2
                      </li>
                      <li class='folder' id='tree1id3'>
                        Folder with some children
                        <ul>
                          <li id='tree1id2.1'>
                            Sub-item 3.1
   