cambiar boton/vinculo al click

[America|UNK]

Código html:

<style type="text/css">
.normal {background:#333}
.activo {background:#FFF}
</style>
<script type="text/javascript">
var trace = function(el){
    var all = el.parentNode.getElementsByTagName("div");
    for(var i=0; i < all.length; i++){
        all[i].className = "normal";
    }
    el.className = "activo";
}
</script>
<div>
<div style="padding:5px; cursor:pointer;" class="activo" onclick="trace(this)"><A HREF="#" onclick="javascript:accionBoton('../../galeria/01.html');"><img src="01.jpg" width="98" height="83" border="0" /></A></div>
<div style="padding:5px; cursor:pointer" class="normal" onclick="trace(this)"><A HREF="#" onclick="javascript:accionBoton('../../galeria/02.html');"><img src="02.jpg" width="98" height="83" border="0" /></A></div>
<div style="padding:5px; cursor:pointer" class="normal" onclick="trace(this)"><A HREF="#" onclick="javascript:accionBoton('../../galeria/03.html')"><img src="03.jpg" width="98" height="83" border="0" /></A></div>
</div>