Free PHP Scripts by Gscripts.net

All you  need to do is to paste the java scripts listed below in your code:

<script language="JavaScript1.2" type="text/javascript">

                                    function addBookmark(url,title) {

                                        if (window.sidebar) {

                                            window.sidebar.addPanel(title, url,""); } 

						else if( document.all ) {

                                            window.external.AddFavorite( url, title); } 

						else if( window.opera && window.print ) 

					{ return true;  }  }

</script>

<a href="javascript:void(addBookmark('http://gscripts.net/','Free PHP / MySQL Scripts'));" class="l">

Bookmark this site </a>

Modify the code colored in red to fit your site description and URL.
Gscripts.net uses this script (look at the left side below the treeview )