一个建树的例子，自己留着看

                <div class="dtree">
                  <script language="javascript">
                   d = new dTree('d','.','testForm');
                   d.config.inOrder=true;
                   d.config.useCookies=true;
                   d.config.closeSameLevel=true;
                   d.add('','-1','所有操作');
                   <logic:iterate name="slist" id="gk">
                    d.add('${gk.operationId}','${gk.systemTypeId}','${gk.systemOperationName}','','','','','true');
                   </logic:iterate>
                   document.write(d);
            
                   function submitForm(){
                    var getvalue = document.getElementById("roleName").value;
                                if (getvalue == "") {
                                  alert("请您输入角色名称！")
                                  return false;
                                }
                    //alert("ids = " + d.getAllCheckIdAndName()[0]);
                    document.all.frm.action = "<%=path %>/systemmanage/rsave.do?method=saverole&bid=<%=bid%>&operation=" + d.getAllCheckIdAndName()[0] + "";
                     document.all.frm.target = "workspacesub_sub";
                                document.all.frm.submit();
                                window.close();
                                return true;
                   }
                  </script>
</div>