Brad,
Please try this:
<script>
function CuteWebUI_AjaxUploader_OnStart()
{
//may call many times for each file
}
function CuteWebUI_AjaxUploader_OnStop()
{
//stop by cancel or error
}
function CuteWebUI_AjaxUploader_OnPostback()
{
//uploaded and prepair to postback
}
</script>
Regards,
Terry