function onUpdateArten(elem)  {
	
	$('sorten').update('<h2>Bitte warten...</h2>\n<p class="ajaxload">lade Pflanzendaten...</p>');

	var currents = document.getElementsByClassName('current',$('kategorien'));
	
	for(var i=0; i<currents.length; i++){
		currents[i].removeClassName('current');
	}
	
	elem.addClassName('current');
	
}