代码示例：（标识：event_istrusted）
<!DOCTYPE html>
<html>
<body>
<p>Click this button to invoke an onclick event, and check whether it is trusted:</p>
<button id="myBtn" onclick="myFunction(event)">试一试</button>
<p>Click this button to trigger an onclick event by a script, and check whether it is trusted:</p>
<button onclick="triggerClick()">试一试</button>
<p><b>注释：</b> The isTrusted property is not supported in Safari and IE8 and earlier.</p>
<script>
function myFunction(event) {
if ("isTrusted" in event) {
if (event.isTrusted) {
alert ("The " + event.type + " event is trusted.");
} else {
alert ("The " + event.type + " event is not trusted.");
}
} else {
alert ("The isTrusted property is not supported by your browser");
}
}
function triggerClick() {
var btn = document.getElementById("myBtn");
btn.click();
}
</script>
</body>
</html>
