Reference: Replace underlined hyperlinks in your Publisher web with non
underlined hyperlinks:
http://msmvps.com/blogs/dbartosik/archive/2006/01/12/81269.aspx

http://cssjuice.com/20-popular-css-online-tools/

http://www.cssplay.co.uk/index

a couple samples:

<style>
a{text-decoration:none;}
a:hover {text-decoration: underline;}
</style>

and:

<style>
a{text-decoration:none;}
a:hover {color: #930015; font-weight: Bold; text-decoration: none;}
</style>

Just use the insert html code fragment tool to insert the snippets into your
web page, do a web page preview and test. Modify as needed.

DavidF