How do I create a CSS in Dreamweaver ASP?

I want to create image link buttons, onMouse over the button has to change to another image. How do I do it with dreamweaver or ASP.How do I create a CSS in Dreamweaver ASP?
That is a job for Javascript.





Here is a site with come code you can Rob:


http://www.sbrady.com/hotsource/javascri鈥?/a>