How to change to color of a link with mouse over effect?

I have a link in blue color.

I want to it to be in black color. Then when a person rolls his mouse over it, it should change to black link wit开发者_Python百科h the underline.

Are you familiar with CSS? You can define effects on anchors like:

a:link  { color: #000000; }
a:hover { text-decoration: underline;  }