Terminating a running web worker examples

First Page
<!DOCTYPE html>
<html>
<head>
<title>Terminating a running web worker examples</title>
<script type="text/javascript">
var worker;

function startWorker(){
worker = new Worker("js/ker.js");
worker.onmessage = update;
worker.postMessage("start");
}

function update(event){
document.getElementById("result").innerHTML = event.data;
}

function stopWorker(){
worker.terminate();
}
</script>
</head>
<body>
<h1>Web Worker Demo</h1>
<button onclick="startWorker();" type="button">Start web worker</button>
<button type="button" onclick="stopWorker();">Stop web worker</button>
<div id="result">
</div>
</body>
</html>
Output

First Page