<!doctype html>
<html>
	<head>
		<title>Draggable button</title>
		<style type="text/css">
button { border: 1px solid orange; border-top-width: 20px; }
		</style>
		<script type="text/javascript">
window.onload = function () {
	document.getElementsByTagName('button')[0].ondragstart = function (e) {
		e.dataTransfer.effectAllowed = 'copy';
    e.dataTransfer.setData('Text', 'dummy text');
	};
};
		</script>
	</head>
	<body>

		<p>Press your mouse button down on the orange block and drag downwards. It should <strong>not</strong> drag the block or text.</p>
		<div>
			<button draggable="true">Dummy text</button>
		</div>

	</body>
</html>