<!–
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Helvetica Neue’; color: #454545}
p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Helvetica Neue’; color: #454545; min-height: 14.0px}
span.s1 {font: 12.0px ‘.PingFang SC’}
–>
<!DOCTYPE html>
<html>
<body>
<h1>My First Web Page</h1>
<input id=”KK” value=”444″>
<button onclick=”myFunction()”>点击这里</button>
<script>
function myFunction()
{
document.getElementById(“KK”).value=”123″;
}
</script>
</body>
</html>