function tx_sadowactivegroups_pi1_init(user, group, hash) {
	new Ajax.Request('index.php', {
 			method: 'get',
			parameters: {eID: 'joingroup', user:user, group:group, hash:hash },
			onSuccess: function(transport){
   	  			var data = transport.responseText.evalJSON(true);
				if(data['success']){
					$('join_' + data['group']).className = 'disabled';
					$('join_' + data['group']).innerHTML = 'Je bent lid';
				}
			}
  		});
}