<![CDATA[<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(w3cdata.com)</title>
</head>
<body>
<p id="demo"></p>
<script>
var x, y, z;
x = 5;
y = 6;
z = (x + y) * 10;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>]]>