Please help: Javascript in sidebar without widgets

I’m trying to implement a javascript to rotate banners on sidebar of the theme nightlife-idea that does not support widgets (the theme viewer site says it does, but they don’t work). I’ve been reading about using javascript on this site but everytime it talks about using a text widget to place code on the sidebar. Where can I place the script in this structure? I want to exchange the content of the default blogroll with a banner rotator (loop scroller) that link to other sites.

<div id="sidebar">
<div id="rss">
<a href="<?php bloginfo('rss2_url'); ?>" title="RSS FEED"><img border="0" src="<?php bloginfo('stylesheet_directory'); ?>/images/rss.gif" width="150" alt="RSS FEED"height="28"></a>
</div>
<div id="searchbg">
<form method="get" id="searchform" action="<?php bloginfo('home'); ?>/"><p align="center">
<input type="text" value="search..." name="s" id="s"
value="search..." onblur="if (this.value == '') {this.value = 'search...';}"
onfocus="if (this.value == 'search...') {this.value = '';}"/>
<input type="submit" value="&raquo;" id="go"></form>
</div>
		<ul>
				<li>
					<h2>Categories</h2>
					<ul>
						<?php wp_list_cats('sort_column=name&hierarchical=0'); ?>
					</ul>
				</li>

				<li>
					<h2>Archives</h2>
					<ul>
						<?php wp_get_archives('type=monthly'); ?>
					</ul>
				</li>

			</li>
			</ul>

			<ul>

				<li>
				<li>
					<h2>Blogroll</h2>
					<ul>
						<?php get_links(-1, '<li>', '</li>', '', FALSE, 'name', FALSE, FALSE, -1, FALSE); ?>
					</ul>
				</li>

				<li>
					<h2>Meta</h2>
					<ul>
						<?php wp_register(); ?>
						<li><?php wp_loginout(); ?></li>
						<?php wp_meta(); ?>
					</ul>
				</li>
			</ul>
		</div>
		<!-- end #sidebar -->