[jQuery] Converting this mootools code to jQuery....help?

[azz0r]

Hey guys, I'm trying to convert my scripts to jQuery, I wondered if
you guys could help me out with this...

window.addEvent('domready', function Online_User_Updater() {
        ajaxRequest = new Ajax(siteURL+'fetch/online-users', {method: 'get',
update: $('usersOnlineTxt')});
                if(ajaxRequest.request()){
                         var interval = 
setInterval('ajaxRequest.request()',300000);
                }
} );