When uploading something get the procentage

Uploaderprogress.html

<script>
/*usage:
	request("get", "https://github.com/DanBrothers/danbrothers.github.io/blob/master/js/main.js", null, 
		function(status, data) {
			if(status==="percent") {
				console.log("file progress: " + data + "%");
			}
			
			if(...) {
			
			}
		}
	);
*/
function request(method, url, data, cb) {
	var ajax = new XMLHttpRequest();
	
	ajax.addEventListener("progress", function go(event) {cb("percent", ((event.loaded / event.total) * 100))}, false);
	ajax.addEventListener("load", function go(event) {cb("eventloaded")}, false);
	ajax.addEventListener("error", function go(event) {cb("error")}, false);
	ajax.addEventListener("abort", function go(event) {cb("aborted")}, false);

	ajax.open(method, url, true);
	ajax.send(data);
}
</script>