Textarea для ввода SMS

<textarea name="sms"></textarea>
<p>
	Кол-во sms: <strong id="count_sms"></strong>; 
	Осталось символов: <strong id="count_symbols"></strong>
</p>

$(function(){
	var limit = 70;
	$('textarea[name="sms"]').bind('change keyup paste', function(){
		var self = this;
		setTimeout(function() {
			var count = $(self).val().length;
			var count_sms = Math.ceil((count) / limit);
			if (count_sms == 0) {
				count_sms = 1;
			}
			$('#count_sms').html(count_sms);
			$('#count_symbols').html(limit * count_sms - (count));
		}, 100);
	});
	
	$('textarea[name="sms"]').trigger('change');
});