Well I’m not 100% sure of the classes that Constant Contact uses…the ‘#CC_signup’ is just an example.
It’s just whatever container element your the form is in (most likely a div), plus input…then tell it to put a black 1px line around it.
<style>
#CC_signup input {border:1px solid #000000;}
</style>
<div id="CC_signup">
<form action="" method="get">
<ul>
<li><label for="firstname">First Name:<label><input type="text" name="firstname" />
</li>
<li>
<input type="submit" value="insert" />
</li>
</ul>
</form>
</div>
Just make sure that there’s not already something declared for the element you’re trying to style…or that there’s not something over-riding the style.