function tabfunc() { 
	if ((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")) { 
		window.sidebar.addPanel ("DiveNews.Com","http://www.divenews.com/sidebar.html",""); 
 	} else {
 		window.alert("Sorry, you need Netscape 6 or Mozilla to use this feature.");
 	}
}