function setCatSelect() {
	// Setzt die Unterkategorie-Box aufgrund der Auswahl der Hauptkategorie-Box
	var idSelectMain = $('vhssem_idmaincat');
	//alert (idSelectMain.value);
	// Mit diesem Wert den AJAX-Request machen
	var optionList;
	
	var idSelectSub = $('vhssem_idsubcat');
	//url = 'http://vhsmainburg.datamints.com/index.php?id=1&eID=tx_datamintsvhsseminars_pi1&ajaxcode=getsubselect&maincat=' + idSelectMain;
	url = 'index.php';
	
	new Ajax.Request(url, {method:'get', parameters:{eID:'tx_datamintsvhsseminars_pi1', ajaxcode:'getsubselect', maincat: idSelectMain.value},
		onSuccess: function(transport) {			
			optionList = transport.responseText;			
			//alert (transport.responseText);
			if (optionList) {
				idSelectSub.replace('<select name="tx_datamintsvhsseminars_pi1[subcat]" id="vhssem_idsubcat" class="vhssem_select">' + optionList + '</select>');
			}
		}
	});		
}