WebSocket thing

gistfile1.js

function send(mp3Url, duration) {
	var url = "ws://your websocket server url here";
	var msg = {
		"play": mp3Url,
		"duration": duration
	};
	var ws = new WebSocket(url);

	ws.onopen = function() {
		if(ws.readyState !== ws.OPEN) {
			console.error('Unable to send data, websocket not open');
			return;
		}

		try {
			ws.send(JSON.stringify(msg));
		} catch(e) {
			console.error('Unable to send data over websocket');
		}

		ws.close();
		ws = null;
	}

	// You may not care about these, but here they are for debugging
	ws.onmessage = function(event) {
		var data = event.data;
		console.log('Received the following data via websocket', data);
	};

	ws.onclose = function() {
		console.log('Websocket closed');
		ws = null;
	};

	ws.onerror = function (err) {
		console.error('Websocket error:', err);
	}
}

var elem = document.getElementById('id-of-your-element');
elem.addEventListener('click', function() {
	send('some mp3 url', 10)
}, false);