45 HTML Web Workers.html

<!DOCTYPE html>
<html>
<body>

<p>How Do You Like Your Iced Tea? <output id="result"></output></p>
<button onclick="sweetened()">Sweetened</button>
<button onclick="unsweetened()">Unsweetened</button>

<script>
var w;

function sweetened() {
	if (typeof(Worker) !== "undefined") {
		if (typeof(w) == "undefined") {
			w = new Worker("demo_workers.js");
		}
		w.onmessage = function(event) {
			document.getElementById("result").innerHTML = event.data;
		};
	} else {
		document.getElementById("result").innerHTML = "Sorry! No Web Worker support.";
	}
}

function unsweetened() {
	w.terminate();
	w = undefined;
}
</script>

</body>
</html>