If I understand correctly, I think that you should be able to solve your problem by listening for the "focus" event on the dots and simulating a click on the dot when you receive it. There are several ways to do this, depending on what frameworks (if any) you are using. For example, if you are working with jQuery and the dots are identified by having the "dot" class:
$('.dot').focus(function(e) {
e.target.click();
}
Here's a small test page that I put together - it seemed to work in both IE10 and Chrome:
<html>
<head>
<script type="text/javascript">
function handleOnLoad() {
var elems = document.getElementsByTagName("span");
var i;
for (i = 0; i < elems.length; ++i) {
elems[i].onfocus = function(event) {
if (event.target) {
event.target.firstChild.firstChild.click();
}
else if (event.srcElement) {
event.srcElement.firstChild.firstChild.click();
}
}
}
}
</script>
</head>
<body onload="handleOnLoad()">
<span class="focus" tabindex="1"><ul class="inactive" tag="scroller"><a href="#scroll1">Foo</a></ul></span>
<span class="focus" tabindex="2"><ul class="inactive" tag="scroller"><a href="#scroll2">Bar</a></ul></span>
<span class="focus" tabindex="3"><ul class="inactive" tag="scroller"><a href="#scroll3">Baz</a></ul></span>
<span class="focus" tabindex="4"><ul class="inactive" tag="scroller"><a href="#scroll4">Ban</a></ul></span>
</body>
</html>