A very simple lightweight jQuery tooltip plugin for limiting textarea input and counting it :)
$(document).ready(function(){
$('input').limitCounter({
limit: 140,
counterClass: 'input',
suffix: 'characters left'
});
$('textarea').limitCounter({
limit: 140
});
});
<input type="text" name="test2" id="test2" placeholder="Type something in this text input!" />
<textarea name="test" id="test" placeholder="Type something in this textarea"></textarea>