javascript lösung
<script language="JavaScript" type="text/javascript"><!--
var undefined;
function act_u(id, color) {
if (color == undefined && id == id1a)
{
id1a.style.color='#cc0000';
id2a.style.color='#8b8b8b';
id3a.style.color='#8b8b8b';
id4a.style.color='#8b8b8b';
}
else if (color == undefined && id == id2a)
{
id1a.style.color='#8b8b8b';
id2a.style.color='#cc0000';
id3a.style.color='#8b8b8b';
id4a.style.color='#8b8b8b';
usw bis 4 farbabfragen erledigt sind.
tom