jQuery类Twitter文本字数限制效果

HTML

<form id="form" method="post" action="">
    <h2>默认风格文本框</h2>
    <div>
        <label for="message">请输入用户信息</label>
        <textarea id="id-textarea-default" name="id-textarea-default"></textarea>
    </div>
    <h2>自定义风格文本框</h2>
    <div>
        <label for="message">请输入用户信息 (Limited to 150, Warning at 120)</label>
        <textarea id="id-textarea-custom" name="id-textarea-custom"></textarea>
    </div>
</form>
					    

JS

$(document).ready(function(){
	// default usage
	$("#id-textarea-default").charCount();
	// custom usage
	$("#id-textarea-custom").charCount({
		allowed:150,
		warning:120,
		counterText:'剩余字数: '
	});
});