comment box, background Options

[crashingg]

how do you add a background image to the comment box? heres the code i have for my comment box...

<!-- begin code provided by createblog.com --><br /><form method="post" action="http://www.myspace.com/index.cfm?fuseaction=user.ConfirmComment"><input name="friendID" value=7673924" type="hidden"><br /><textarea name="f_comments" cols="40" rows="7" style="border-width: 5px; border-style: double; border-color: Black; font-family: arial; font-size: 8pt; color: FF22CC; background-color: transparent; width:330; height:200;" style="overflow:auto;"></textarea><br> <input value="I &hearts; ISHA" style="border-width: 1px; border-style: solid; border-color: black; font-family: arial; font-size: 8pt; color: black; background-color: transparent;" type="submit">&nbsp;<input value="STARTOVER?!" style="border-width: 1px; border-style: solid; border-color: black; font-family: arial; font-size: 8pt; color: black; background-color: transparent;" type="reset"></form><br /><!-- end code provided by createblog.com -->

and i want to add an image to the background of the comment box..
how do i do that?