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<html><body><h1>The Window Object</h1><h2>The setTimeout() and clearTimeout() Methods</h2><button onclick="startCount()">Start count!</button><input type="text" id="demo"><button onclick="stopCount()">Stop count!</button><p>Click on "Start count!" to start the timer. The input field will count forever, starting at 0.</p><p>Click on "Stop count!" to stop counting. Click on "Start count!" to start the timer again.</p><script>let counter = 0;let timeout;let timer_on = 0;function timedCount() { document.getElementById("demo").value = counter; counter++; timeout = setTimeout(timedCount, 1000);}function startCount() { if (!timer_on) { timer_on = 1; timedCount(); }}function stopCount() { clearTimeout(timeout); timer_on = 0;}</script></body></html>