[Scott]

<script type="text/javascript">
function show_message(val) {
	elid = document.getElementById("message");

	if(val==1) {
		elid.style.visibility = "visible";
	} else {
		elid.style.visibility = "hidden";
	}
}
</script>

<input type="radio" name="sop" onclick="show_message(1);" />Sponsor<br />
<input type="radio" name="sop" onclick="show_message(0);" />Partner</br />

<div id="message" style="visibility:hidden">
$25 is required to become a sponsor!
</div>