A jQuery plugin to add notes below textareas and input fields based on regex patterns.
Type something. As soon as you type a number, a note will be added below the textarea. If you type “sex”, a warning will be shown.
You can use it for everything that has values, so for example a text inputfield will do it as well.
The patterns are normal JavaScript regex patterns and you are free to create and style any type of notes and note texts as you want. Note texts can contain HTML, no problem.

Source

http://fredibach.ch/jquery-plugins/inputnotes.php

Demo

http://fredibach.ch/jquery-plugins/inputnotes.php#demo

jMaxInput allows you to limit the input size of a textarea like it is done in Twitter. The number of characters left to type are shown while typing. The user can write as many characters as he wants (negative value is shown) but the text can only be submitted if the size of the input is below the limit (the button is active/inactive).

You can call it like this:

$("#div").maxinput();

You can as well define the following properties:

1. limit: The maximum number of characters allowed
2. position: The position of the message
3. showtext: Boolean for showing the text message or just the number of characters left
4. message: A custom message shown after the number of characters left

View demoDownload jMaxInput