可缩放的文本框。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 缩放(Resizable) - 文本框</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.9.1.js"></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
  <style>
  .ui-resizable-se {
    bottom: 17px;
  }
  </style>
  <script>
  $(function() {
    $( "#resizable" ).resizable({
      handles: "se"
    });
  });
  </script>
</head>
<body>
 
<textarea id="resizable" rows="5" cols="20"></textarea>
 
 
</body>
</html>