javascript - Mootools list filter with periodical request to the server -

i have html markup (online users list):

<div id="users">    <div class="users_row" title="user1">user1</div>    <div class="users_row" title="user2">user2</div>    <div class="users_row" title="user3">user3</div>    <div class="users_row" title="user4">user4</div> </div> 

my mootools js function below (periodical function every 5 seconds):

      get_users: function() {                                     new request.json({                     initialdelay: 1,                     delay: 10000,                     limit: 25000,                     method: 'post',                     url: 'handler.php',                           onsuccess: function(data){                             if (data.users.length) {                                 data.users.each(function(u){ /*wrong...*/                                     new element('div', {'html':u.name, 'class': 'user_row', 'title': u.name}).inject(document.id('users'));                                   });                                  }                                }                 });         } 

for example user1, user2, user3, user5 handler.php. how can rebuild online users list?

 <div id="users">        <div class="users_row" title="user1">user1</div>        <div class="users_row" title="user2">user2</div>        <div class="users_row" title="user3">user3</div>        <!--<div class="users_row" title="user4">user4</div>!--> // remove user4        <div class="users_row" title="user5">user5</div> // add user5  </div> 

p.s: answer not acceptable :)

document.id('users').set('html', '<div class="users_row" title="'+u.name+'">'+u.name+'</div>); 

thanks.

p.s: json sample server:

{"users":[{"name":"user1"},{"name":"user2"},{"name":"user3"},{"name":"user5"}],"total":4} 

try this:
check demo here

for (i = 0; < users.users.length; i++) {         var el = new element('div', {             'class': 'users_row',             'html': users.users[i].name         });         el.inject(usersdivid);     }