function openfeedback(art) {
		  nwindow=window.open('/_static/feedback.shtml?'+art,'image','toobar=no,location=no,directories=no,status=no,scrollbars=no,resizable=no,copyhistory=no,width='+420+',height='+280);
		  ndoc = nwindow.document;
		  nwindow.focus();
		  ndoc.close();
		  self.nwindow = nwindow;
	}