add an ID to the select tag and another onchange function:
<select name="RecurType" id="RecurType" onchange="toggleRecurOn(this.options[this.selectedIndex].value);showSelection();">
add a span to show the selection:
<span id="selectionSpan"></span>
define the onchange event:
<script type="text/javascript">
function showSelection() {
var theList = document.getElementById("RecurType");
var theSelection = theList.options[theList.selectedIndex].value;
var theSelectionSpan = document.getElementById("selectionSpan");
theSelectionSpan.innerHTML = "you Slected: "+theSelection+"";
}
</script>