index.html

<!DOCTYPE html>
<html>
<head>
    <title>Chunked Multipart Test</title>
    <script type="text/javascript" src="client.js"></script>
    <link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
	<form id="pieces">
		<p>
			Amount of pieces to request.<br />
			If field is left blank then infinite amount will be requested. Thus data will be consumed and added to the DOM until page crashes eventually.
		</p>
		<input type="text" id="count" /><input type="button" id="request" value="request">
	</form>
</body>
<script type="text/javascript">
	document.getElementById('request').onclick = function () {
		var form = document.getElementById('pieces'),
			countInput = document.getElementById('count'),
			count = parseInt(countInput.value, 10);

		handleMultipart('/multipart' + (count ? '?count='+count : ''));
	};
</script>
</html>