<script>
function autoSaveEntry() {
if($('#txtarea').val().length>0){
$('#message').append('Text is saved');
setTimeout(function () {

            $('#message').fadeOut(function(){
            });

        }, 3000);

 }
 setTimeout(autoSaveEntry, 60000)
 }
 </script>

<div id="#message"></div>
<textarea id="txtara"></textarea>