This is a neat little feature that just makes your site seem more "advanced" or professional if applied correctly.  Using it as a link, you can automatically let the visitor bookmark your site or page by a click of the mouse.  This only works for IE 4.0+ browsers, sorry.

Inside Header
<script LANGUAGE="JavaScript1.2">

var bookmarkurl="your web page URL or http address"
var bookmarktitle="your web page title"

function addbokmark(){
if (document.all)
window.external.AddFavorite(bookmarkurl, bookmarktitle)
}

</script>

As the Link
<a href="javascript:addbookmark()">
your text or image goes here like shown below

<img src="image name">
or
Click Here to bookmark this site!!!

</script>

The bolded words need to be replaced with your site information in order for it to work correctly.  Otherwise you will bookmark nothing.  The first portion must be placed inside your "Head" tags (<head> </head>).  If you don't do it correctly, not only will it not work, but you will also run script errors on your visitors.  Have fun!