Jquery text文本框限制字数或文本框提示字数

<form name="" id="" action="" class="Form">
    <textarea id="wordtext" style="width:600px;"></textarea>
    <div id="wordage"></div>
    <a style="color:#fff;float:left;font-size:18px;" href="#" class="Button blueButton Button18"><strong>注册登录</strong></a>
</form>
<script type="text/javascript">
$(document).ready(function(){
    
    var limitNum = 118;
    
    var pattern = '还可以输入' + limitNum + '字';
    
    $('#wordage').html(pattern);
    
    $('#wordtext').keyup(
        function(){
            var remain = $(this).val().length;
            if(remain > 118){
                pattern = "字数超过118个限制，短信将以多条发送！";
            }else{
                var result = limitNum - remain;
                pattern = '还可以输入' + result + '字';
            }
            $('#wordage').html(pattern);
        }
    );
     
});    
</script>