function isconnected(wsid,dealer,branch) {
        new Ajax.PeriodicalUpdater(
		'sessionstatus',
		'typo3conf/ext/user_reifensuche2/pi1/connect.php', {
		     method: 'get',
			 frequency: 240,
			parameters: {
				wsid: wsid,
				dealer: dealer,
				branch: branch
			}
	   });
	}