How do I make an expanding textbox?

Question

I want to make a textbook where it starts out as a given width/height. Then if users type more then the given amount of space, the textbox expands downward. How do I go about do

Answer 1

jQuery AutoResize Plugin
http://james.padolsey.com/javascript/jquery-plugin-autoresize/

Steps to use:

You need jQuery. To add it to your page:

Then, download the plugin and put it in the same folder as your web page. To reference it, add this to your web page:

Next, add a textbox to your page:

    Type something in here, when you get close to the end the box will expand!

Finally, in a script block, add the code that hooks up the plugin to the textbox: