How to put counter of remaining charector of text in textbox

How to put counter for char remaining in textbox

Html

<asp:TextBox runat="server" ID="TxtBody" CssClass="form-control" TextMode="MultiLine" Rows="5" placeholder="Body" MaxLength="159" ></asp:TextBox>
<div id="Textremaining"></div>

Javascript

$(document).ready(function() {
    var maxChar = 159;
    $('#Textremaining').html(maxChar + ' remaining');

    $('#<%=TxtBody.ClientID%>').keyup(function() {
        var length = $('#<%=TxtBody.ClientID%>').val().length;
        var remaining = maxChar - length;

        $('#Textremaining').html(remaining  + ' characters remaining');
    });
});