Google
Варианты подсказок около линка
Example a)
<a href="#" onmouseover="drc('Enter into the world of professional web marketing.','PlanMagic WebQuest Pro'); return true;" onmouseout="nd(); return
true;">Линк</a>

Example b)
<a href="#" onmouseover="overlib('CGI scripts, DHTML scripts, Javascripts and VB scripts collection', HEIGHT, 30, LEFT, ABOVE, SNAPX, 5, SNAPY, 10); return true;" onmouseout="nd(); return
true;">Линк</a>

Example c)
<a href="#" onmouseover="overlib('<b><i><font color=\'#000000\' size=\'2\' face=\'Verdana\'>Business planning and<br>Marketing planning software</font></i></b>', FULLHTML); return true;" onmouseout="nd(); return true;">Линк</a>

Example d)
<a href="#" onmouseover="overlib('<b>Shareware & Freeware, Affiliate Programs, Information Library, Web Hosting, Music, Fonts, DHTML Scripts and More..</b>', TEXTCOLOR, '#0000cc', WIDTH, 232, HEIGHT, 104, BACKGROUND, 'images/background.gif', PADX, 60, 20, PADY, 20, 20); return true;" onmouseout="nd(); return
true;">Линк</a>

Example e)
<a href="javascript:void(0);" onmouseover="return overlib('Your message here.', FIXX, 80, FIXY, 250)" onmouseout="return nd();">Линк</a>

Example f)
<a href="javascript:void(0);" onmouseover="return overlib('<b>Your list:</b><UL><LI>Item 1<LI>Item 2<LI>Item 3</UL>', STICKY);" onmouseout="return nd();">Линк</a>

Example g)
<a href="javascript:void(0);" onmouseover="return overlib('Click on me!');" onclick="return overlib('This one stays around for a while!', STICKY, CAPTION, 'Sticky');" onmouseout="return nd();">Click here Линк</a>

Example h)
<a href="javascript:void(0);" onmouseover="overlib('<a href=\'1html\'>Подлинк 1</a><br>
<a href=\'2.html\'>Подлинк 2</a>', STICKY); return true;" onmouseout="nd(); return true;">Линк</a>