Change default form button

Hello

Can you please tell me if is it possible to change the default "choose" button
from this form with an image (custom button) :

<form method="post" action="upload.php" enctype="multipart/form-data">
File : <input type="file" name="file"  /><br/>
<input type="image" src="images/send.gif" name="upload_form" value="Upload Now!">
</form>

HTML:

Sorry for my poor english.

 

You'll find an example here: http://www.echoecho.com/htmlforms14.htm

 

I know how to change submit button (I use this in example above)
I need to change choose button.(please look at the attachement)

 

There are a few things I'd like to change with a few form elements too but I'm afraid you are limited.

 

it's simple, the best way to do it imo is to play with css
background-image: url(image.jpg) will do the trick
you can play also with the borders and other css elements.
if that doesn't work for you, check this site pagetutor.com/button_designer/index.html
good luck