​x
 
<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>Wfuyu教程(wfuyu.com)</title> 
</head>
<body>
​
<p>设置 x=10 和 y=5, 计算 x*=y, 并显示结果。</p>
<button onclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
function myFunction()
{
    var x=10;
    var y=5;
    x*=y;
    var demoP=document.getElementById("demo")
    demoP.innerHTML="x=" + x;
}
</script>
​
</body>
</html>