What do you mean by "autoresponder"?
Perhaps you are just wanting to style a form? In which case you will have some code which says something like the following (where ... is a bunch of code):
Code:
<form method="post" action="">
<input name="search" value="search" />
<input type="submit" name="Submit" value="Search">
</form>
To style the input tag with graphics, you could apply a background image like this ...
Code:
<form method="post" action="">
<input name="search" value="search" style="background:url('http://www.developertutorials.com/images/logo2.gif')" />
<input type="submit" name="Submit" value="Search">
</form>