define alink, vlink, link in CSS?

Is there any way to define the link colors in a CSS file?

Code:

---

<style type="text/css">
<!--
a:link {
        color: #003366;
}
a:visited {
        color: #FF0000;
}
a:hover {
        color: #0000FF;
}
a:active {
        color: #00FFFF;
}
-->
</style>

---