use this code
<code>
<p><b><a href="ja.v.ascr.iptspelltherightway..:window.exter nal.AddFavorite('http://www.yoursite.com','Site Name')"><nobr><font face="Verdana, Arial, Helvetica, sans-serif" color="#FFFFFF">Click</font><font face="Verdana, Arial, Helvetica, sans-serif" color="#000000"><font color="#FFFFFF">
Here To Bookmark This Site!(Only works in IE)</font></font></nobr></a> </b><font color="#FFFFFF" face="Verdana, Arial, Helvetica, sans-serif"><br>
<font size="+1">Press Ctrl-D To Bookmark This Site In Netscape</font></font>
<font color="#FFFFFF"><br>
</font></p>
</code>