<html><head> <meta charset="UTF-8"> <title>蝴蝶教程（cainiaoya.com）</title></head><body><p>统计数字: <output id="result"></output></p><button onclick="startWorker()">开始计数</button><button onclick="stopWorker()">停止计数</button><p><strong>提示:</strong> IE9或更早的IE版本浏览器不支持 Web Workers.</p><script> var w; function startWorker() { if(typeof(Worker) !== "undefined") { if(typeof(w) == "undefined") { w = new Worker("/jc_script/demo_workers.js"); } w.onmessage = function(event) { document.getElementById("result").innerHTML = event.data; }; } else { document.getElementById("result").innerHTML = "对不起您的浏览器不支持 Web Workers..."; } } function stopWorker() { w.terminate(); w = undefined; }</script></body></html>