$.ajax({
			type: "POST",
			url: "ajax.php",
			data: "text="+ text,
			beforeSend: function(){
    			$('#data li').fadeOut(500);
			},
 			success: function( daten ) {
			   window.setTimeout( function() {
				   $('#data li').html( daten );
			   },500);
			},
			complete: function(){
			  $('#data li').fadeIn(500);
			}

		});