supporter code in theme files - help.

Alrighty, I can't quite figure out how to use the supporter code in my theme. I'm not too well-versed in php.

I'm trying to add some adsense blocks & have an alternative banner display if the blog is a supporter blog, coded in via a different function. What am I doing wrong here? I'm getting a "syntax error, unexpected '}'" @ the else.

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<?php if (supporter_hide_ads()) {
newThemeOptions_showHeaderBanner()
} else {
<script type="text/javascript"><!--
google_ad_client = "";
google_ad_slot = "";
google_ad_width = 468;
google_ad_height = 60;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
}?>
----------

Furthermore, how is the above code different from the following (from the instructions)? Is it simply not triggered by the "disable ads" in the menu?

----------
if (is_supporter()) {
//blog has been upgraded to a supporter
//code or content goes here
} else {
//blog has not been upgraded to a supporter
//code or content goes here
}
----------

Thanks...