Hola,
Aca tengo un script que te puede servir. Si no funciona, te lo pue
<BODY>
<!-- The JavaScript Source!! http://javascript.internet.com -->
<!-- Original: Spriteworks Developments -->
<!-- Web Site: http://www.spriteworks.com -->
<SCRIPT language = "javascript">
<!--
var ie = document.all ? 1 : 0
var ns = document.layers ? 1 : 0
if(ie){
document.write('<style type="text/css">')
document.write('.textfield {font-size:10pt; font-family:arial; color:#808080; font-weight:bold;}\n')
document.write('.hexfield {font-size:10pt; font-family:arial; color:#808080; font-weight:bold;}\n')
document.write('.buttons {border-style: solid; background-color: #808080; border-color: #000000; border-width: 1; color: #FFFFFF; font-size: 10pt; font-family: arial; font-weight: bold;}\n')
document.write('</style>')
}
//--> </SCRIPT>
<CENTER><!--Aqui te dan las instrucciones de uso-->
<SCRIPT language="JavaScript" src='http://www.guistuff.com/gens/tooltip.js'></SCRIPT>
</CENTER>
