Here's a handy script you can place on your site to allow your visitors to automatically bookmark your page with a single click. Fully functional for both IE and Mozilla browsers.
Place this part in the HEAD section of your page.
<script language="javascript" type="text/javascript">
function bookmarkme(title, url){
if (document.all)
window.external.AddFavorite(url, title);
else if (window.sidebar)
window.sidebar.addPanel(title, url, "")
}
</script>
Place this part where you want the bookmark link to display.
<a href="javascript:bookmarkme('TrafficZap Free Traffic', 'http://www.trafficzap.com')">Bookmark This Page</a>
There are input parameters for Title and URL, which you can alter in the display code (the link).