// JavaScript Document
function loadOnlineUser(user)
{
    var url                    = 'online_ajax.php?user=' + user;
    $('ol_' + user).innerHTML  = 'loading ....';
    
	var myAjax = new Ajax.Request(url, {
        method: 'get',
        onSuccess: function(transport) { 
            $('ol_' + user).innerHTML = transport.responseText;                        
        },
        
        onFailure: function(transport) {
            alert('Error loading data!');
        }
    });
}