<html>
<body>
<p>单击该按钮可显示浏览器的版本。</p>
<button onclick="myFunction()">试一试</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = "浏览器版本:" + navigator.appVersion;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>