[jQuery] textarea 글자수 카운팅

$(document).ready(function() {
    $('.js_cmt_textbox').length && countText();
    $('.js_count_cmt').length && countComment();
})

// textarea 글자수 count
function countText() {
    $('.js_cmt_textbox').keyup(function(){
        var content = $(this).val(),
            count_crt = $('.js_count_crt');

        if(content.length == 0 || content == ''){
            count_crt.text('0');
        }else{
            count_crt.text(content.length);
        }
    })
}

// 전체 댓글 수 count
function countComment() {
    var count_cmt = $('.js_count_cmt'),
        cmt_length = $('.clsDataNum').val();

	count_cmt.text(cmt_length);
}