Display a percentage label on top of the progress bar to give users
a clear numeric indication of upload completion.
<div id="uploader"></div>
<div id="pctBar">
<div id="pctFill"></div>
<span id="pctLabel">0%</span>
</div>
AjaxUploader.create(el, {
uploadUrl: '/ajaxupload.axd/upload',
onTaskProgress: function(task, pct) {
fill.style.width = pct + '%';
label.textContent = Math.round(pct) + '%';
}
});