CSS background for textarea
There are many ways of customizing your form elements. One thing to keep in mind is that web users are used to the form elements that their browsers gives them by default, so for usability reasons, I recommend leaving the form elements alone in their default state.
You can apply a background-color or background-image to any form element. In this example i'm using it in a textarea, and you can also see why sometimes it is not a good idea to change the background. The left part of the text is very hard to read.
<form name="form1" method="post" action="">